What to do when one misses a prayer
Question

                If a person missed a the scheduled prayer.Is it necessary to still pray it at another time. For example if I missed the fajr prayer can I still pray it later on?
Praise be to Allah.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.