Cross reference
1 Samuel 17:9
9 If he is able to have a fight with me and overcome me, then we will be your servants: but if I am able to overcome him, then you will be our servants and do work for us.
1 Samuel 11:1
1 Then about a month after this, Nahash the Ammonite came up and put his forces in position for attacking Jabesh-gilead: and all the men of Jabesh said to Nahash, Make an agreement with us and we will be your servants.