2 Timothy 4:15

Be on guard against him yourself, for he vigorously opposed our teaching.

Matthew 10:16-17

Behold, I send you out as sheep in the midst of wolves; so be shrewd as serpents and innocent as doves.

Philippians 3:2

Beware of the dogs, beware of the evil workers, beware of the false circumcision;

2 Timothy 3:8

Just as Jannes and Jambres opposed Moses, so these men also oppose the truth, men of depraved mind, rejected in regard to the faith.

Treasury of Scripture Knowledge

Summary

Of whom be thou ware also; for he hath greatly withstood our words.

Bible References

Be

Matthew 10:16
Behold, I send you out as sheep in the midst of wolves; so be shrewd as serpents and innocent as doves.
Philippians 3:2
Beware of the dogs, beware of the evil workers, beware of the false circumcision;