“The Messenger of Allah (ﷺ) used to sleep during the first part of the night and stay awake during the latter part.”
Sunan Ibn Majah Book 5, Hadith 563
← Previous Hadith “I came to the Messenger of Allah (ﷺ) and said: ‘O Messenger of Allah, who became a Muslim with you?’ He said: ‘A free man and a slave.’ I said: ‘Is there any hour of the night that is closer to Allah than another?’ He said: ‘Yes, the last half of the night.’”

Sunan Ibn Majah Book 5, Hadith 562 Next Hadith → “Our Lord, the Blessed and Exalted, descends when one third of the night remains, every night and He says: ‘Who will ask of Me, that I may give him? Who will call upon Me, that I may answer him? Who will ask My forgiveness, that I may forgive him?’ until dawn comes.” Hence they used to prefer voluntary prayers at the end of the night rather than at the beginning.

Sunan Ibn Majah Book 5, Hadith 564