Cross reference
2 Timothy 4:15
15 of whom do thou also beware; for he greatly withstood our words.
2 Timothy 3:8
8 And even as Jannes and Jambres withstood Moses, so do these also withstand the truth. Men corrupted in mind, reprobate concerning the faith.
Matthew 10:16-17
16 Behold, I send you forth as sheep in the midst of wolves: be ye therefore wise as serpents, and harmless as doves.
17 But beware of men: for they will deliver you up to councils, and in theirs synagogues they will scourge you;
Philippians 3:2
2 Beware of the dogs, beware of the evil workers, beware of the concision: