en_tn_condensed/act/20/29.md

vicious wolves will come in among you and will not spare the flock

This is a picture of people who teach false doctrine and who harm the community of believers as though they were wolves that eat the sheep of the flock. Alternate translation: "many enemies will come among you and try to harm the community of believers" (See: rc://en/ta/man/jit/figs-metaphor)