The ruling on one who eats camel meat while forgetting or being ignorant, then prays

The questioner:
So, if a person eats [camel meat] without believing [it invalidates wudu] and does not know until after the prayer, he does not know about the prayer.

The Shaykh:
If a person eats camel meat and does not know that camel meat invalidates wudu, or if he forgets that he ate camel meat and prays, he must repeat the prayer because he prayed without wudu. If a person forgets to perform wudu and prays, is that prayer sufficient for him? No, he must repeat the prayer because it was performed without wudu, so he repeats the prayer. But if the number of prayers is large, suppose Salim did not know that camel meat invalidates wudu until now, and he is sixty years old now; he is excused due to the length of the period, or if he acted based on the opinion of the majority, or if he consulted one of the scholars and they issued a fatwa for him, then his past prayers are valid.
But if the preponderance of the opinion that it invalidates wudu becomes apparent to him later in his life, he acts according to that only in the future. As for what has passed, he is excused, either due to his ignorance and the large number of prayers, or because he acted based on the opinion of the majority in this matter, or because he consulted a scholar who issued a fatwa for him. All these are excuses that drop the requirement to make up the prayers in the past. But in the future, he acts according to what is preponderant for him. Yes.