Answer
Firstly, you must make every effort to perform your Fajr Salaat on time with
Jamaat. If for some reason, you oversleep and there was no one to wake you
up, then you must make the Salaat as soon as you get up as long as it is not
the forbidden time, i.e. sunrise.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai
FATWA DEPT.