John Gill Commentary Daniel 4:23

"And whereas the king saw a watcher and a holy one coming down from heaven, and saying, Hew down the tree, and destroy it; nevertheless leave the stump of the roots thereof 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 heaven: and let his portion be with the beasts of the field, till seven times pass over him;" — Daniel 4:23 (ASV)

And whereas the king saw a watcher, and an Holy One
Here is related another part of the dream, which respects the cutting down of the tree, or the miserable condition the king should be brought into; see (Daniel 4:13–16).