Matthew 6 v 1
Take heed that you do not your alms before men, to be seen of them: otherwise, you have no reward of your Father which is in heaven.
Matthew 7 v 15
Beware of false prophets, which come to you in sheep’s clothing, but inwardly they are ravening wolves.
Matthew 16 v 6,11-12
Then Jesus said unto them, Take heed and beware of the leaven of the Pharisees and the Sadducee’s. How is it that you do not understand that I spake it not to you concerning bread, that you should beware of the leaven of the Pharisees and the Sadducees? Then understood they how that Jesus bade them not beware of the leaven of bread, but the doctrine of the Pharisees and the Sadducees.