'Watcher' in the Bible

I saw in the visions of my head on my bed, and behold, a watcher and a holy one came down from the sky.

Whereas the king saw a watcher and a holy one coming down from the sky, and saying, Cut down the tree, and destroy it; nevertheless leave the stump of its roots in the earth, even with a band of iron and brass, in the tender grass of the field, and let it be wet with the dew of the sky: and let his portion be with the animals of the field, until seven times pass over him;