The ruling on the prayer of one whose mind is affected by old age

Question:
May Allah reward you. Sometimes he does not know the times of the prayer. When he is informed of the time for prayer, he performs tayammum, then he forgets what I told him, or what was said to him, or what was changed for him. Sometimes he prays with him, and his least time is in his silence, and he does not know, until an old man.

Answer:
If he does not understand the prayer and does not know about it, or even if he enters into it, he does not complete it because he is distracted from it, then there is no prayer required of him, because he does not have a complete mind. There is no prayer required of him. Yes.