Is it obligatory for the believer to wash the two passages before every ablution?

Question:
Is it obligatory for the believer to wash the two passages before every ablution? May Allah reward you with good.

Answer:
In the name of Allah, the Most Gracious, the Most Merciful. Praise be to Allah, Lord of the worlds, and may Allah send prayers and blessings upon our Prophet Muhammad, his family, and all his Companions. As for what follows, the obligatory act is istinja' (cleaning oneself after relieving oneself) when one relieves himself, by removing the trace of what came out of the two passages, either by washing it with water, which is called istinja', or by wiping it with stones until it is purified, which is called istijmar. One does not repeat this unless something else comes out. If he wants to perform wudu' (the ablution for prayer), he performs wudu' without istinja', as long as he has already performed istinja' previously and nothing else has come out since then. He remains in the state of his first istinja', so he performs wudu' without istinja', because istinja' is not one of the limbs of wudu'; rather, it is the removal of najasah (ritual impurity) if it is present. Yes.