بسم الله الرحمن الرحيم
A questioner asks:
What is the ruling on the one who sleeps through Salatul Fajr due to staying up late into the night for the purpose of studying?
Shaykh Saalih Al Fawzaan answers:
Mashaa Allah! Mashaa Allah! This is a successful one(!) he neglects the obligation (of Fajr Prayer), and he stays awake through the night.
What is the meaning of seeking of knowledge here?! Whilst he is losing and neglecting the obligatory acts, there is no benefit in this seeking of knowledge.
Salaatul Fajr is a must to be prayed in its correct time with the congregation and there is nothing that takes precedence over it.