Watch over

Watch over sb:To protect someone and make certain that they are safe.

Usage:
The prince has two bodyguards watching over him every hour of the day.

Excerpts from soaps, novels and films:

Bold and the beautiful
” Taylor: What I wouldn’t give to have you back, Darla. Thorne believes you’ve been watching over us. I just can’t — I can’t believe what’s been happening. No one could ever replace you, but — I really do — I really do care about Thorne and Alexandria. I guess I just — I want to know if you support that. I just wish you could give me some kind of sign or something.
Thorne: Taylor?

Taylor: I was talking to Darla about what we talked about earlier.

Thorne: Darla’s here. She’s the one that brought us together.”