"Truly, Allah loves those who repent, and He loves those who cleanse themselves."
[Al-Baqarah 2:222]
"There is nothing more dear to Allah Ta’ala than a servant making dua to him."
[at Tirmidhi]
"The person who does not ask from Allah Ta’ala, Allah Ta’ala becomes angry with him."
[at Tirmidhi, Ahmad]
"The dua of a Muslim for his brother (in Islam) in his absence is readily accepted, an angel is appointed to his side, whenever he makes a beneficial dua for his brother the appointed angel says "aameen and may you also be blessed with the same".
[Sahih Muslim]
"Dua is the essence of Ibadah (worship)."
[at Tirmdhi, Ahmad]
"If you ask, ask Allah and if you seek help, seek help from Allah."
[at Tirmdhi, Ahmad]
"O my servants, were the first of you and last of you, the human of you and jinn of you to rise up in one place and make a request from me, and were I to give everyone what they requested, that would not decrease what I have anymore than a needle decreases the sea if put into it."
[Sahih Muslim]
"When a person dies, all his actions come to an end with the exception of three:1) Sadaqa Jaariyaa recurring charity>,2) Knowledge from which benefit continues to be reaped,3) And the prayers of his pious children for him."
[Sahih al-Bukhari]
""The invocation of any one of you is granted [by Allah] as long as he does not show impatience by saying "I have invoked Allah but my request has not been answered."
[Sahih al-Bukhari, Muslim]
"And whoever does evil or wrongs himself but afterwards seeks Allah's forgiveness, he will find Allah Oft-Forgiving, Most Merciful."
[surah an-Nisa; 4:110]
"And declare the freedom of your Rubb from imperfection beginning with His praise, and ask His forgiveness. Verily, He is the One Who accepts the repentance and Who forgives."
[surah 110:3]
"Any muslim who supplicates to Allah in a Du'a which contains no sin breaking of kinship, Allah will give him one of three things: either his Du`a will be immediately answered or, it will be saved for him in the hereafter, or it will turn away an equivalent amount of evil (from him)" The companions said "so we will ask for more" he replied, "Allah is more [generous]."
[at-Tirmidhi, Ahmad]
"Ask forgiveness for your sin and also for the believing men and women"
[Surah 47:19]
"The Prophet, salAllahu alaiyhi wasalam, said to him while Ibn-Abbas was riding behind him on the same mount;"young man, I shall teach you some words [of advice]:Be mindful of Allah and you will find him in front of you. If you ask, ask only Allah and if you seek help, seek help only from Allah. And know that if all the nations were to gather together to benefit you, they would benefit you only with something that Allah had already prescribed for you, and if they gather together to harm you, they would harm you only with something that Allah had already prescribed for you. The pens have been lifted and the pages are dry."
[at-Tirmidhi]
"Ask and you will be given, ask you will be given"
[at-Tirmidhi]
"And when my servants ask you concerning me, [tell them] I am indeed near. I respond to the invocation of the supplicant when he calls."
[surah al Baqarah; 2:187]
"And your lord said, invoke me and I will respond to your invocation."
[Surah 40:60]
"Invoke your lord with humility and in secrecy, for God loveth not those who trespass beyond bounds."
[Surah 7:55]
"So invoke Allah making your worship pure for him."
[Surah 40:14]
"Invoke Him only, making your religion sincere to him."
[Surah 7: 29]
"the Prophet, salAllahu alayhi wasalam, was asked "which Du'a is more heard (by Allah)?" The Prophet, salAllahu alayhi wasalam, said, "The Du'a during the last part of the night and after the Fard prayers."
[at-Tirmidhi, 3421]
"Abu Hurayrah (radiAllahu anhu) reported that the Messenger of Allah, salAllahu 'alayhi wa sallam, said,"When someone of you prays, let him not say, 'O Allah forgive me if that is Your wish.' But let him be firm in conviction and cherish a great hope and Allah does not consider anything too great which He is able to grant."
[Sahih al-Bukhari]
"Aisha radhiallaahu anha said, "No believer makes Dua and it is wasted. Either it is granted here in this world or deposited for him in the Hereafter as long as he does not get frustrated."
"Or, Who listens to the (soul) distressed when it calls on Him, and Who relieves its suffering, and makes you (making) inheritors of the earth? (Can there be another) God besides Him? Little it is that ye heed!."
[an-Naml: 62]
"For any one among you, if the door of acceptance of du`a is opened, then the doors of His Mercy are also opened. The best du`a Allah likes is the one in which the caller asks for the goodness of this world and the goodness of the next world."
[at-Tirmidhi, al-Hakim]
"Du'a is a weapon of a believer, a pillar of religion, and a light of the heavens and the earth."
[al-Hakim]
"Nothing prevents predestination except Du'a, and nothing stretches the age except righteousness."
[at-Tirmidhi]
"Do not feel hopeless with Du'a, since nobody is to be annihilated with Du'a."
[ibn Hiban]
"Abu Darda' (radiAllahu anhu) reported:I heard the Messenger of Allah, salAllahu alayhi wasalam, saying, "Whenever a Muslim supplicates for his (Muslim) brother in his absence, the angels say: `May the same be for you too."
[Muslim, 1494]
"Abu Darda' (RadiAllahu anhu) reported:The Messenger of Allah, SalAllahu alayhi wasalam, said,"The supplication of a Muslim for his (Muslim) brother in his absence will certainly be answered. Everytime he makes a supplication for good for his brother, the angel appointed for this particular task says: `A meen! May it be for you, too."
[Muslim, 1495]
"And ask forgiveness for your sin, and also for (the sin of) believing men and believing women"
[Surah 47:19]
"I heard Allah's Apostle saying." By Allah! I ask for forgiveness from Allah and turn to Him in repentance more than seventy times a day."
[Sahih al-Bukhari, 8:319]
"Narrated abu Hurairah (radiAllahu anha)Allah's Apostle said, "For every prophet there is one (special invocation (that will not be rejected) with which he appeals (to Allah), and I want to keep such an invocation for interceding for my followers in the Hereafter."
[Sahih al-Bukhari, 8:317e]
An-Numan bin Bashir (radiAllahu anhum) narrated that the Prophet (salAllahu alayhi wa salam) said:"Verily, Supplication is worship."
[al-Arba'a (the four), at-Tirmidhi]
abu Hurairah(radiAllahu anhum) narrated that the Prophet (salAllahu alayhi wa salam) said:"Nothing is more honorable (most liked) before Allah (Ta'ala) than Supplication."
[at-Tirmidhi, ibn Hibban and al-Hakim]
"Verily, they used to hasten on to do good deeds, and they used to call on Us with hope and fear, and used to humble themselves before us."
[surah 21:90]
"Dhan-Nun (Jonah), when he went off in anger, and imagined that We shall not punish him. But he cried through the darkness (saying): La ilaha illa Anta (none has the, right to be worshiped but You) Glorified be You, Truly, I have been of the wrongdoers."
[surah 21:87]
Anas (radiAllahu anhum) narrated that the Prophet (salAllahu alayhi wa salam) said:"A supplication made between the Adhan and Iqama is not rejected."
[an-Nasai and ibn Hibban]
abu Hurairah(radiAllahu anhum) narrated that the Prophet (salAllahu alayhi wa salam) said:"There is an hour on Friday and if a Muslim gets it while offering Salat (prayer) and asks something from Allah (Ta'ala), then Allah (Ta'ala) will definitely meet his demand." And he (the Prophet (salAllahu alayhi wasalam) pointed out the shortness of that time with his hands."
[Sahih al-Bukhari]
abu Hurairah(radiAllahu anhum) narrated that the Prophet (salAllahu alayhi wa salam) said:"The nearest a slave can be to his Rabb (Cherisher and Sustainer) is when he is prostrating, so invoke (supplicate) Allah (Ta'ala) much."
[Sahih Muslim]
abu Ummamah (radiAllahu anhum) narrated that the Prophet (salAllahu alayhi wa salam) was asked:"O Messenger of Allah, which supplication is heard (by Allah (Ta'ala), he said the end of the night and at the end of the obligatory Salat (prayer)."
[at-Tirmidhi]
"Three supplications will not be rejected (by Allah (Ta'ala)), the supplication of the parent for his child, the supplication of the one who is fasting, and the supplication of the traveler)."
[al Bayhaqi]
"Is not He Who responds to the distressed one, when he calls Him, and Who removes the evil, and makes you inheritors of the earth, generation after generation. Is there any god with Allah? Little is that you remember."
[surah 27:62]