'Angel's' in the Bible

“This is the end of the matter. As for me, Daniel, my [waking] thoughts were extremely troubling and alarming and my face grew pale; but I kept the matter [of the vision and the angel’s explanation] to myself.”

So I took the little book from the angel’s hand and ate it, and in my mouth it was as sweet as honey; but once I had swallowed it, my stomach was bitter.