How is “watch over” used?

In Transformers (2007), one line is: “but watching over them in secret,”

Which movie is “watch over” from?

The clip at the top of this page is from Transformers (2007).

to take care of sb / sth; to guard and protect sb / sth

formal · Heard in 17 movies

Oxford94% of films
to take care of sb / sth; to guard and protect sb / sth
Please watch over everybody.

Definitions from the Oxford Advanced Learner's Dictionary, 9th edition

but watching over them in secret,

Said in 8 films · #1