It wasnarrated that 'Amr bin 'Abasah said:
"I came to the Messengerof Allah (ﷺ) and said: 'O Messenger of Allah, who became a Muslimwith you?' He said: 'A free man and a slave.' I said: 'Isthere anyhour of the night that is closer to Allah than another?'He said:'Yes, the last half of the night.'" (RU)
English reference (RU): Vol. 1, Book 5, Hadith 1364 (RU)
Arabic reference (RU): Book 5, Hadith 1426 (RU)