What is the ruling if one of the spouses does not pray, or if both do not?

Your Eminence, our brother from the Arab Republic of Egypt, Ahmad Abdullah Ahmad Ali, says: In the villages of Egypt, 50% do not pray before marriage, especially the girls. It is a large percentage, Your Eminence, and especially since he says that they are Muslims.
Answer: As mentioned previously, if the husband does not pray and the wife does not pray, their marriage is valid; because they are either both Muslims according to the majority, or both disbelievers according to the correct opinion. Thus, they are equal, and their marriage is valid. The point of disagreement is when one of them does not pray and the other prays, meaning: the other is a Muslim and the second is not a Muslim, due to his abandoning of prayer. This is where the disagreement lies. The correct view is that the marriage is not valid, as mentioned previously. Rather, it is obligatory to renew the marriage if the one who does not pray repents.