all who were found in Jerusalem and Benjamin

This can be stated in active form. Alternate translation: "all who lived in Jerusalem and Benjamin" (See: rc://en/ta/man/jit/figs-activepassive)

stand by the covenant

This is an idiom. Alternate translation: "accept the terms of the covenant" or "promise to obey the covenant" (See: rc://en/ta/man/jit/figs-idiom)