1 Samuel 17:14

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

1 Samuel 16:11

Samuel asked him, “Are these all the sons you have?”

“There is still the youngest,” he answered, “but right now 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 people will come from you and be separated.
One people will be stronger than the other,
and the older will serve the younger.

Treasury of Scripture Knowledge

Summary

And David was the youngest: and the three eldest followed Saul.

Bible References

The youngest

1 Samuel 16:11
Samuel asked him, “Are these all the sons you have?”

“There is still the youngest,” he answered, “but right now 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 people will come from you and be separated.
One people will be stronger than the other,
and the older will serve the younger.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.