It was narrated that ‘Amr bin ‘Abasah said:“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.’”

English translation · Sunan Ibn Majah