1 Samuel 17:14

Christian Standard Bible Anglicised

and David was the youngest.  The three eldest had followed Saul,

Cross References

1 Samuel 16:11

Samuel asked him, ‘Are these all the sons you have? ’ ‘There is still the youngest,’  he answered, ‘but at the moment he’s tending the sheep.’ Samuel told Jesse, ‘Send for him. We won’t sit down to eat until he gets here.’

Genesis 25:23

And the Lord said to her: Two nations are in your womb; two peoples will come from you and be separated. One people will be stronger than the other, and the elder will serve the younger.

1 Samuel 17:15

but David kept going back and forth from Saul  to tend his father’s flock in Bethlehem.