'Watcher' in the Bible

" 'I was looking in the vision of my head [as I lay] on my bed, and look, a watcher, and holy [one], came down from heaven.

And [inasmuch] that the king saw [the] watcher, a holy [one] coming down from heaven and he said, "Cut down the tree and destroy it, but the stump of its root in the earth leave with a band of iron and bronze in the grass of the field, and let it be watered with the dew of heaven and [let] his lot [be] with [the] animals of the field {until seven times have passed over him}."