1 Samuel 24:10-12
Behold, this day your eyes have seen how that the LORD had delivered you to day into my hand in the cave: and some bade me kill you: but my eye spared you; and I said, I will not put forth my hand against my lord; for he is the LORD's anointed.
Nave's Topical Index—AKJV

1 Samuel 26:9,23
And David said to Abishai, Destroy him not: for who can stretch forth his hand against the LORD's anointed, and be guiltless?
Nave's Topical Index—AKJV

2 Samuel 1:14-17
And David said to him, How were you not afraid to stretch forth your hand to destroy the LORD's anointed?
Nave's Topical Index—AKJV