Passage
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.
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.
1 Samuel 17:11 When Saul and all Israel heard those words of the Philistine, they were dismayed, and greatly afraid.
1 Samuel 17:12 Now David was the son of that Ephrathite of Bethlehemjudah, whose name was Jesse; and he had eight sons: and the man went among men for an old man in the days of Saul.
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.
1 Samuel 17:14 And David was the youngest: and the three eldest followed Saul.
1 Samuel 17:15 But David went and returned from Saul to feed his father’s sheep at Bethlehem.
The verse centers on "three", "eldest", "sons", "jesse", "went", "followed", "saul", and "battle". It is saying that the verse draws attention to "three" and "eldest", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 12's "Now David was the son of that..." into verse 14's "And David was the youngest and the...", so "three" and "eldest" belong inside that flow. In 1 Samuel context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "three" and "eldest" with trust shaped by these words, not by a vague optimism outside the passage.