Allah descends in the last third of the night

In the last third of every night Allah calls: who will ask, that I may give?

Narrated by Abu Hurairah

Our Lord descends every night to the lowest heaven when the last third of the night remains, and says: "Who is calling upon Me, that I may answer him? Who is asking of Me, that I may give him? Who is seeking My forgiveness, that I may forgive him?"

Sahih al-Bukhari 1145, Sahih Muslim 758

What this hadith teaches

The last third of the night, before Fajr, is the best time for tahajjud and dua.

Reference and grade

Grade
Sahih: agreed upon by al-Bukhari and Muslim
Narrator
Abu Hurairah

The hadith in Arabic نص الحديث

مَنْ يَدْعُونِي فَأَسْتَجِيبَ لَهُ مَنْ يَسْأَلُنِي فَأُعْطِيَهُ مَنْ يَسْتَغْفِرُنِي فَأَغْفِرَ لَهُ

Arabic text of Sahih al-Bukhari 1145, as given on sunnah.com.