in-law, the men who had promised to marry his daughters** - The phrase "the men who had promised to marry his daughters" explains what "sons-in-law" means here. It could also be translated as "the men who were going to marry his daughters" or "his daughters' fiancés"
"so Yahweh does not also destroy you when he punishes the the people of this city" (See: [[rc://en/ta/man/translate/figs-activepassive]] and [[rc://en/ta/man/translate/figs-metonymy]])