Whoever missed the Fajr prayer or any other prayer out of forgetfulness or because of oversleeping, has to perform it as soon as he remembers it and he should not delay it except for a necessity. This is the view of the majority of scholars and they provided as evidence the Hadeeth reported by Al-Bukhari and Muslim . The Prophet said: "Whoever forgets a prayer, he has to perform it as soon as he remembers it, and its expiation is to perform it as soon as he remembers it.
Another Hadeeth reads: "Whoever sleeps and misses a prayer or forgets to pray it, its expiation is to pray it as soon as he remembers it." [Muslim] . The evidence for this is that when the Prophet and his Companions overslept and did not pray Fajr prayer on time and it was the heat of the sun that woke them up, he ordered them to pray two Rak'ahs Sunnah of Fajr and then pray Fajr. [Abu Daawood]


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