2 Timothy 4:15

Be on guard against him yourself, because he vigorously opposed our message.

Matthew 10:16-17

“Listen carefully: I am sending you out like sheep among wolves; so be wise as serpents, and innocent as doves [have no self-serving agenda].

Philippians 3:2

Look out for the dogs [the Judaizers, the legalists], look out for the troublemakers, look out for the false circumcision [those who claim circumcision is necessary for salvation];

2 Timothy 3:8

Just as Jannes and Jambres [the court magicians of Egypt] opposed Moses, so these men also oppose the truth, men of depraved mind, unqualified and worthless [as teachers] 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
“Listen carefully: I am sending you out like sheep among wolves; so be wise as serpents, and innocent as doves [have no self-serving agenda].
Philippians 3:2
Look out for the dogs [the Judaizers, the legalists], look out for the troublemakers, look out for the false circumcision [those who claim circumcision is necessary for salvation];