Zadok ... Abiathar

See how you translated these men's names in 2 Samuel 15:24. (See: rc://en/ta/man/jit/translate-names)

in such and such a way

This phrase, meaning "like this," refers to what Ahithophel advised Absalom earlier beginning in 2 Samuel 17:1. (See: rc://en/ta/man/jit/figs-idiom)