en_tn/1ki/02/32.md

General Information:

King Solomon explains why Joab should die.

May Yahweh return his blood on his own head

The word "his" refers to Joab. "Blood" is a metonym for murder. And, the idiom "his blood on his own head" means the person should be considered guilty for murder. Alternate translation: "Joab has murdered people, and I want Yahweh to hold him guilty for what he has done" (See: rc://en/ta/man/jit/figs-metonymy and rc://en/ta/man/jit/figs-idiom)

more righteous and better

These words mean basically the same thing and emphasize that Abner and Amasa were much better men than Joab. (See: rc://en/ta/man/jit/figs-doublet)