ANSWER:

If the time of prayer has begun for sure, then yes.

Can we pray in congregation at home before the azan of mosque?

Prayer | May 15, 2020 12:11 am
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Sheikh, is the 2 Sunnah rahkats before fajr that the prophet (saws) said it is better than the world and everything in it is that considered as tahajjud or does it only have the first reward. if I make the intention to follow that Sunnah and also make the intention to pray tahajjud do I get both the reward. The reward of tahajjud and the reward of the 2rakats before fajr.
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Sheikh…if a person stands instead of sitting for tashahhud in second rakah of fajr salah and after standing he remembers ..what should he do ..sit back to tashahhud or something else