The ruling on the wudu of one who wipes only the sides of the head while wearing the shemagh

Question:
He says: Honorable Shaykh, may Allah grant you success. A person, when he performs wudu, does not take off the shemagh, and he wipes the sides of the head, but does not reach the front or the back of the head. He thinks that this is sufficient, and he has been in this state for about three years. Is his action valid, and what is required of him?

Answer:
He does not wipe the entire head. The shemagh is not a necessity; he should move the shemagh and wipe the entire head. As for what has passed, Allah forgives it. Some scholars say that wiping part of the head is sufficient, but the correct view is that it is obligatory to wipe the entire head. If he was unaware of this in the past, Allah forgives it, but in the future he must complete wiping the entire head. Yes.