en_tn_lite_do_not_use/mat/07/15.md

Beware of

"Be on guard against"

who come to you in sheep's clothing but are truly ravenous wolves

This metaphor means that false prophets will pretend they they are good and want to help people, but they are really evil and will do people harm. (See: rc://en/ta/man/jit/figs-metaphor)