Is it a condition for the witnesses to a marriage contract that they be committed to the teachings of Islam, and what is the ruling on the contract if the witnesses are not?

Question:
Our brother has a lengthy case, the summary of which is that he heard from one of the students of knowledge that the witnesses to a marriage contract must be from those who pray and are committed to the teachings of Islam. Consequently, he is anxious because the witnesses to his marriage contract did not possess those qualities. So what do you advise him to do now? May Allah reward you with good.

Answer:
It is a condition for the witness, whether for a marriage contract or for anything else, that he be righteous. Righteousness means that he is careful to observe the obligatory duties, avoids the forbidden, maintains good morals and good character, and is far from vices and baseness. This is according to what is possible. This condition is considered according to what is possible, and the best is the best in every age according to its circumstances. This is from the perspective of the general rule. Yes. As for the contract that has taken place and ended, the default is that it is valid, if Allah wills. Yes. May Allah reward you with good.