Some people, when they feel tired during the night prayer, let their hands hang down in the prayer. What is the ruling?

Question:
Honorable Shaykh, may Allah grant you success, some people during the night prayer and tahajjud, when they are tired and standing for a long time in the prayer, let their hands hang down. Is this permissible?

Answer:
No, this is contrary to the preferred practice, though it is permissible. It leaves off the recommended practice (sunnah). But if he is tired and wants to rest his hand for a short while, then return it to the recommended practice, there is no harm if he does this for the sake of rest. Yes.