Psalms 144:10

"Thou art he that giveth salvation unto kings;

Who rescueth David his servant from the hurtful sword."

"David his servant" (Psalms 144:10). This cannot mean anyone else except the king David who succeeded Saul. The idea is repulsive that any other of the so-called Davidic-line of kings would have been called God's servant. Furthermore, it was nothing unusual for David to refer to himself in his writings. "He refers to himself as `David' in Psalms 18:50, and in 2 Samuel 7:27; and he refers to himself as `the king' in Psalms 51:6 and Psalms 53:11."[18]