"The Prophet would pray Ad-Duha until we would say: 'He will not leave it.' And he would leave it until we would say: 'He will not pray it.'"
Jami` at-Tirmidhi Book 3, Hadith 25
← Previous Hadith Allah's Messenger said: "Whoever continuously performs the two Rak'ah of Ad-Duha his sins will be forgiven, even if they be like the foam of the sea."

Jami` at-Tirmidhi Book 3, Hadith 24 Next Hadith → "Allah's Messenger would pray four (Rak'ah) after the Zawal of the sun before Az-Zuhr. He said: 'It is an hour in which the gates of the heavens are opened, and I love that a righteous deed should be raised up for me in it.'"

Jami` at-Tirmidhi Book 3, Hadith 26