2 Samuel 6:6

6:6 When they arrived at the threshing floor of Nacon, Uzzah reached out and grabbed hold of the ark of God, because the oxen stumbled.

2 Samuel 9:6

9:6 When Mephibosheth son of Jonathan, the son of Saul, came to David, he bowed low with his face toward the ground. David said, “Mephibosheth?” He replied, “Yes, at your service.”