It was narrated from Ibn "Abbas that

the Messenger of Allah (ﷺ) delayed ‘Isha" until as much of the night as Allah willed had passed. Then ‘Umar said to him: O Messenger of Allah, the women and children have gone to sleep. He came out and said: "Were it not that it would be too difficult for my ummah, I would have enjoined them to pray at this hour.”