Final answer:
In the biblical account found in 1 Samuel, four of Jesse's sons, including David, were present on the battlefield with King Saul.
Step-by-step explanation:
The question pertains to a historical event described in the Bible and is referring to Jesse's sons who fought in a battle alongside King Saul. According to the Bible, specifically in the 1 Samuel, David was the youngest son of Jesse and the only one mentioned by name as being at the battlefield with Saul, though initially as a harp player and later facing Goliath.
However, three of David's older brothers, Eliab, Abinadab, and Shammah, are listed as being soldiers in Saul's army during the time of the battle against the Philistines. Therefore, according to the biblical account, four sons of Jesse were present on the battlefield with Saul.