Is the prayer of one who wipes over his socks valid, and is prayer behind an Imam who says "wa la az-zalileen" instead of "wa la ad-dalileen" valid?

The issue of wiping over socks is a matter of scholarly disagreement, and the preponderant opinion is the permissibility of wiping over them when the conditions are met. This disagreement should not be a cause for division among Muslims. Rather, it should be addressed through scholarly advice and by clarifying the strength of the opinion that permits it. Furthermore, a brother's difference in opinion does not prevent one from praying behind him. Indeed, the Companions and the Imams used to pray behind each other despite their differences in some jurisprudential issues.