Nehemiah 4:20 describes rallying to the trumpet for mutual defense — same principle of coordinated help in battle.

Ecclesiastes 4:9-12 teaches that two are better than one, helping each other — echoes Joab's plan for mutual support.

Galatians 6:2 calls believers to bear one another's burdens — a NT application of the same mutual care principle.

Philippians 1:27 urges striving side by side with one mind — mirrors the teamwork Joab proposes.