In 2 Samuel 17:25, Amasa's mother Abigail is identified, who is David's sister (see 1 Chronicles 2:16-17), confirming the kinship David claims.

In 2 Samuel 3:9, Abner uses the same oath formula 'May God do so to me and more also' when pledging to David. Strong verbal parallel.

In 2 Samuel 5:1, the tribes tell David 'we are your bone and flesh' — the same phrase David uses here to Amasa. Strong verbal echo.

In 2 Samuel 20:4, David immediately follows up this appointment by ordering Amasa to gather Judah. Direct narrative continuation.

In 2 Samuel 20:5, Amasa delays carrying out the order from 20:4, showing the consequence of David's appointment here.

In 1 Chronicles 2:17, Amasa is identified as the son of Abigail, David's sister, making him David's nephew — the flesh and blood David appeals to.

In Ruth 1:17, Ruth uses a similar oath formula ('May the Lord do so to me and more also'), matching David's self-imprecation in his oath to Amasa.

In 1 Chronicles 2:16, Abigail is listed as David's sister, explaining why David calls Amasa 'my own flesh and blood' — he is David's nephew.

In 1 Chronicles 11:1, all Israel tells David 'we are your bone and flesh' — identical phrase used here. Strong verbal echo.

Genesis 2:23 uses 'bone and flesh' for Adam and Eve; David uses the same phrase to claim kinship with Amasa.

In 2 Kings 6:31, King Joram swears using the same formula 'May God do so to me and more also' against Elisha. Strong verbal parallel.

In 1 Kings 2:23, Solomon uses the exact same oath formula 'May God do so to me and more also' against Adonijah. Strong verbal parallel.

1 Samuel 20:13 has Jonathan's oath of loyalty to David; David now uses the same oath to secure Amasa's loyalty.

1 Samuel 14:44 has Saul's death oath against Jonathan; David uses the same oath but for promotion—a contrast in outcome.

1 Samuel 3:17 has Eli's oath 'May God do so to you and more also'; David uses the exact same formula to bind Amasa.

Judges 9:2 uses 'your bone and flesh' by Abimelech to win support; David similarly appeals to Amasa as family.

Genesis 29:14 has Laban saying 'you are my bone and flesh' to Jacob; David says the same to Amasa to affirm family ties.

In 1 Kings 19:2, Jezebel uses the same oath formula ('May the gods deal with me, be it ever so severely'), similar to David's oath to Amasa.