I heard the Messenger of Allah (ﷺ) as saying: There is an hour during the night in which no Muslim bondman will ask Allah for good in this world and the next but He will grant it to him.
Sahih Muslim Book 6, Hadith 200
← Previous Hadith There is an hour during the night in which no Muslim individual will ask Allah for good in this world and the next without His giving it to him; and that applies to every night.

Sahih Muslim Book 6, Hadith 199 Next Hadith → Our Lord, the Blessed and the Exalted, descends every night to the lowest heaven when one-third of the latter part of the night is left, and says: Who supplicates Me so that I may answer him? Who asks Me so that I may give to him? Who asks Me forgiveness so that I may forgive him?

Sahih Muslim Book 6, Hadith 201