1 Samuel 26:9-11

9 And David said to Abishai, Destroy him not: for who can stretch forth his hand against the LORD’s anointed, and be guiltless?

10 David said furthermore, As the LORD liveth, the LORD shall smite him; or his day shall come to die; or he shall descend into battle, and perish.

11 The LORD forbid that I should stretch forth mine hand against the LORD’s anointed: but, I pray thee, take thou now the spear that is at his bolster, and the cruse of water, and let us go.