en_tn/2sa/03/28.md

Ner ... Abishai ... Asahel

These are the names of men. (See: rc://en/ta/man/translate/translate-names)

the blood of Abner

Here "blood" refers to the death of Abner. See how you translated a similar phrase in 2 Samuel 3:27. Alternate translation: "the death of Abner" or "the murder of Abner" (See: rc://en/ta/man/translate/figs-metonymy)