What does 1 Samuel 16:10 mean?
After God rejected Saul as king (1 Samuel 15:22–29, 35), he told Samuel to stop grieving and anoint a replacement (1 Samuel 16:1). That new king would be one of Jesse the Bethlehemite's sons. Samuel is now in Bethlehem to anoint this son and to offer a sacrifice to the Lord (1 Sameul 16:2, 5). But the prophet does not know which son God has chosen (1 Samuel 16:3).The sons are progressively presented to Jesse, and progressively rejected (1 Samuel 16:6–9). This happens seven times. Samuel tells Jesse that none of these sons are the one. We find out in the next verse that only seven of Jesse's eight sons were present at the time (1 Samuel 16:11). It must have been shocking to apparently come to the end of the sons and have each of them rejected.
Commentators point out that in the genealogy in 1 Chronicles 2, David is said to be the seventh son of Jesse (1 Chronicles 2:15). Scholars speculate that perhaps one of the other sons died without having children and was left out of the genealogy. First Samuel 17:12 confirms Jesse had eight sons. In 1 Samuel 16:11 David is said to be the "youngest" or the "smallest."