The Book of Mosques and Places of Prayer

كتاب الْمَسَاجِدِ وَمَوَاضِعِ الصَّلاَةِ

Chapter 55: Making up a missed prayer. And it is recommended to hasten to make it up

Qatada narrated on the authority of Anas b. Malik that the Messenger of Allah (ﷺ) said

He who forgets the prayer, or he slept (and it was omitted), its expiation is (only) that he should observe it when he remembers it.

Qatada reported it on the authority of Anas b. Malik that the Messenger of Allah (ﷺ) said

When any one of you omits the prayer due to sleep or he forgets it, he should observe it when he remembers it, for Allah has said:" Observe prayer for remembrance of Me."