It is narrated from Hazrat Abu Saeed (may Allah be pleased with him) and Abu Huraira (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: When one third of the night passes, Allah Almighty descends to the lowest heaven and announces: Who is there to supplicate to Me? Who is there to seek forgiveness from Me? Who is there to repent? A man asked: Does this announcement continue until the break of dawn? He replied: Yes!
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 11295