Behold, one in the likeness of the sons of men touched my lips; then I opened my mouth, and spoke and said to him who stood before me, “My lord, by reason of the vision my sorrows are turned on me, and I retain no strength.

“sons of men.” The Hebrew reads “sons of man,” that is the sons of “mankind” (or “humankind”), i.e., human. The angel was in human form.