1 Chronicles 21:15-16

21:15 And God sent an angel unto Jerusalem to destroy it: and as he was destroying, the LORD beheld, and he repented him of the evil, and said to the angel that destroyed, It is enough, stay now thine hand. And the angel of the LORD stood by the threshingfloor of Ornan the Jebusite. 21:16 And David lifted up his eyes, and saw the angel of the LORD stand between the earth and the heaven, having a drawn sword in his hand stretched out over Jerusalem. Then David and the elders [of Israel, who were] clothed in sackcloth, fell upon their faces.

1 Chronicles 21:2

21:2 And David said to Joab and to the rulers of the people, Go, number Israel from Beersheba even to Dan; and bring the number of them to me, that I may know [it].

1 Samuel 24:16

24:16 And it came to pass, when David had made an end of speaking these words unto Saul, that Saul said, [Is] this thy voice, my son David? And Saul lifted up his voice, and wept.

Psalms 103:20

103:20 Bless the LORD, ye his angels, that excel in strength, that do his commandments, hearkening unto the voice of his word.

Hebrews 1:14

1:14 Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation?