1 Samuel 13:2

13:2 Saul selected for himself three thousand men from Israel. Two thousand of these were with Saul at Micmash and in the hill country of Bethel; the remaining thousand were with Jonathan at Gibeah in the territory of Benjamin. He sent all the rest of the people back home.

1 Samuel 16:1

Samuel Anoints David as King

16:1 The Lord said to Samuel, “How long do you intend to mourn for Saul? I have rejected him as king over Israel. Fill your horn with olive oil and go! I am sending you to Jesse in Bethlehem, for I have selected a king for myself from among his sons.”