1 Samuel 17:13
And the three eldest sons of Jesse went and followed Saul to the battle: and the names of his three sons that went to the battle were Eliab the firstborn, and next unto him Abinadab, and the third Shammah.
Cross-reference
1 Samuel 17:28 shows Eliab, David's oldest brother, rebuking him — revealing family tension among the sons.
In 1 Samuel 16:6-9, these same three sons are presented to Samuel but rejected by God, showing they are not the chosen king.
1 Samuel 16:8 specifically shows Abinadab being presented to Samuel, one of the three sons listed here.
1 Samuel 16:9 shows Shammah being presented to Samuel, confirming his place among the three eldest.
1 Chronicles 2:13 lists Jesse's sons in the same order, confirming Eliab, Abinadab, and Shammah as David's older brothers.
2 Chronicles 11:18 names Eliab as Jesse's son, confirming his identity as David's brother and grandfather of Rehoboam's wife.
2 Samuel 21:21 records that Shammah's son Jonathan killed a giant, showing the family's warrior legacy.
2 Samuel 13:3 identifies Shammah (called Shimeah) as the father of Jonadab, linking this brother to later events.
2 Samuel 13:32 again mentions Jonadab son of Shimeah (Shammah), reinforcing the family connection.