'Observer' in the Bible

"Then I saw in the visions of my head while I was in bed and take careful notice! I saw a holy observer descend from heaven.

"Your majesty saw a holy observer descending from heaven and saying, "Cut down the tree and destroy it, but leave the stump in the ground, along with its roots, bound with iron and bronze in the field grass. Let him be soaked with the dew of the sky and live with the wild animals of the field until seven seasons pass over him.'