The answer to this question may be found in the following ahaadeeth:
Anas ibn Maalik said: “The Messenger of Allaah (peace and blessings of Allaah be upon him) said: ‘If one of you sleeps and misses a prayer, or forgets it, then let him pray it as soon as he remembers, because Allaah says (interpretation of the meaning): ‘… and perform al-salaah for My remembrance.’ [Ta-Ha 20:14]”
(Reported by Muslim, 1104).
Abu Hurayrah reported that the Messenger of Allaah (peace and blessings of Allaah be upon him) said: “Whoever forgets the prayer, let him pray as soon as he remembers, because Allaah says (interpretation of the meaning): ‘… and perform al-salaah for My remembrance.’ [Ta-Ha 20:14]”
(Reported by Muslim, 1097).
Anas ibn Maalik reported that the Messenger of Allaah (peace and blessings of Allaah be upon him) said: “Whoever forgets a prayer, let him pray it as soon as he remembers, for there is no expiation for it except this.”
(Reported by Muslim, 1102).
And Allaah knows best.