Hazrat Abu Abdur Rahman says: Was there no one to wake you up? Allah Almighty says: Perform prayer for My remembrance.

Hazrat Sha'bi and Ibrahim, in the explanation of this verse { أَقِمِ الصَّلاَۃ لِذِکْرِی }, state that it means if you forget to perform the prayer, then whenever you remember, perform it at that time.

Hazrat Sakhr bin Juwairiyah says that I asked Hazrat Nafi’ about a person who forgets to perform the Asr prayer and the sun has turned yellow, so what should he do now? He replied that he should perform it; there is nothing like prayer.

Hazrat Hakam says that recite it whenever you remember.

Ibrahim, regarding the person who sleeps without offering the Isha prayer until the sun rises, says that he should offer it at that time.

Hazrat Zuhri narrates that the Holy Prophet (peace and blessings be upon him) slept at the time of Fajr prayer, until the sun had risen. He said to his companions, "Leave the place where you were overcome by heedlessness." Then he recited this verse: { أَقِمِ الصَّلاَۃ لِذِکْرِی }