My father is advanced in age and suffers from the ailments of old age, and he speaks during the prayer. Should we order him to repeat it?

Question:
He says: Honorable Shaykh, may Allah grant you success, why does he say my father is advanced in age and suffers from the ailments of old age, and he prays, but he forgets and speaks in his prayer, so should we order him to repeat it, or what do we do with him?

Answer:
Allah (Exalted and Majestic is He) said: So if he prays according to his ability, that is sufficient, even if he speaks in it. Because this is not intentional, but rather due to old age and senility, so his prayer is valid, if Allah wills.