Abu Huraira (radi Allahu anhu) narrates from Rasool Allah(Sallallahu alaihi wasallam), “Do duaa to Allah with his confidence that He will accept it and know this well that Allah doesn’t accept the duaa done with a negligent and careless heart.”(Tirmizi)

Abu Huraira(radi Allahu anhu) narrates from Rasool Allah(Sallallahu alaihi wasallam), “Allah is extremely displeased with the person who doesn’t do duaa to Allah.”(Tirmizi)

Abu Huraira(radi Allahu anhu) narrates from Rasool Allah (Sallallahu alaihi wasallam), “In the court of Allah, there is no greater thing than Duaa.”(Ibn-e-Majah)

Abdullah bin Umar(radi Allahu anhu) narrates from Rasool-Allah(Sallallahu alaihi wasallam),” Among whatever has been descended and whatever has not been descended Duaa is beneficial of all. Oh people of Allah! Assume Duaa a must for yourselves.” (Tirmizi)

Jabir(radi Allahu anhu) narrates from Rasool-Allah(Sallallahu alaihi wasallam), “Whoever does duaa to Allah, Allah fulfills his seeking or in exchange averts misfortune until the duaa is not related to sin or breaking some relation.” (Tirmizi)

Salman Farsi(radi Allahu anhu) narrates from Rasool-Allah(Sallallahu alaihi wasallam), “Duaa turns away destiny, and good deeds lengthen age. (Tirmizi)

Umar (radi Allahu anhu) narrates that, “Whenever Rasool-Allah( Sallallahu alaihi wasallam) raised his hands for duaa, he did not put them down until HE took both hands over his face.” (Tirmizi)

Jabir (radi Allahu anhu) narrates from Rasool-Allah (Sallallahu alaihi wasallam), “Don’t do Bad-duaa [against] yourself, your wealth, or for your children. May it be the moment of acceptance in the court of Allah, and your Bad-duaa be accepted. (Muslim)