ANSWER:
If their prayers are considered invalid due to the speed in bowing and prostration, so not pray behind them.
Otherwise, pray and then continue to pray in your home after that to win the reward of full night prayer.
ANSWER:
If their prayers are considered invalid due to the speed in bowing and prostration, so not pray behind them.
Otherwise, pray and then continue to pray in your home after that to win the reward of full night prayer.