Make Intention to read Fajr, but couldn’t wake up.
In the name of Allah, the most Beneficent, the most Merciful.
As long as you had intention to wake up and read your fajr salah, then inshallah you will be rewarded by Allah (SWA) even though you do not or could not wake up.
The Prophet of Allah Sallallahu Alahi Wasalam has said; “A person who intends to do a good deed has one good recorded in his Book of Deeds- even if he does not get around doing it. Following that, when he gets to do that good deed, ten good deeds are recorded in his Book of Deeds. And if a person intends to do a sin, then stays back and does not do it, still a good is recorded for him-and if he were to actually commit a sin, still what he gets registered in his name is one sin, or that may be erased. (Sahih Bukhari Sahih Muslim & Sunan Nasaai.)
Only Allah Knows Best
Mohammed Tosir Miah
Darul Ifta Birmingham.