1 Samuel 17:12-15

12 At this time, David's father Jesse was a very old man. Jesse belonged to the clan of Ephrathah. He came from Bethlehem town in Judah. He had e ight sons. 13 Jesse's three oldest sons had joined Saul's army to fight the war. They were Eliab, Jesse's oldest son, his second son, Abinadab, and his third son, Shammah. 14 David was Jesse's youngest son. While Jesse's three oldest sons were in Saul's army, 15 David would sometimes leave Saul and go back home to Bethlehem. He did that to take care of his father's sheep.