ibn Mas'ud · The Book of the Times (of Prayer)

It was narrated from 'Aishah that the Messenger of Allah (ﷺ) prayed 'Asr when the sun was in her room and the shadow had not appeared on her wall.

The Messenger of Allah (ﷺ) said: "Whoever forgets a prayer, let him pray it when he remembers it."

"The Messenger of Allah (ﷺ) said: 'There is no negligence when one sleeps, rather negligence is when one does not offer one prayer until the time of the next prayer comes and he realizes that he has missed a prayer.'"