The obligation of standing in the obligatory prayer and the permissibility of sitting in the voluntary prayer

Question:
Honorable Shaykh, may Allah grant you success, how do you reconcile what the Messenger of Allah (peace and blessings be upon him) mentioned, that the reward of a healthy person who sits in prayer is half the reward of one who stands,

Answer:
in the voluntary prayer, it is not the same as in the obligatory prayer. In the obligatory prayer, sitting suffices if one is able to stand, whereas in the voluntary prayer, it is permissible, even if one is able to stand, but he receives half the reward of the one who is able to stand. This is the case in the voluntary prayer. Yes.