The imam’s voice was cut off from the ma’mum (congregation) due to a power outage, and some of them completed the prayer without the imam; what is the ruling?

Question:
May Allah reward you with good and do you well. The listener, Mustafa Abdul Wahab Hasan Bakr, sent a question saying: It happened that while we were praying the Eid prayer in the open, the electricity went out while we were in the first prostration of the second unit. We were praying in the last rows, so we did not rise from the prostration until the imam had said the closing salam, when one of the worshippers said Allahu Akbar because he saw us. It happened that many people had already said the salam and left the prayer without completing the second prostration, while others, like me, performed the second prostration, recited the tashahhud, and then said the salam. What is the ruling in this case, Honorable Shaykh? May Allah reward you with good.

Answer:
Those who performed the second prostration, recited the tashahhud, and then said the salam, their prayer is valid and they completed it, praise be to Allah. As for those who said the salam with the imam and did not perform the second prostration, if they remembered it shortly after, they should perform a full unit of prayer. If they remember it shortly after and are still in the place, they should perform the second prostration; they do not perform a full unit, but rather they perform the second prostration, then recite the final tashahhud, then say the salam, and then perform the two prostrations of forgetfulness after the salam. If they perform these two prostrations before the salam, there is no harm. However, if they do not remember until after a long time, it is obligatory for them to repeat the entire prayer.