2 Samuel 2:22
22 And Abner said again to Asahel, “Turn aside from following me. Why should I strike you to the ground? How then could I lift up my face to your brother Joab?”
Deuteronomy 22:8
8 “When you build a new house, you shall make a parapet for your roof, that you may not bring the guilt of blood upon your house, if anyone should fall from it.