2 Samuel 20:8 describes Joab killing Amasa — the tragic outcome of David's order here.

2 Samuel 20:11 shows Joab's men rallying after Amasa's death — a direct continuation of this narrative.

2 Samuel 17:25 introduces Amasa as Absalom's general — the same man David commissions here.

2 Samuel 19:13 records David appointing Amasa as commander — the context for his commission here.

1 Chronicles 2:17 gives Amasa's genealogy — his mother Abigail and father Jether, confirming his identity.