'Take Heed' in the Bible

Take heed that you do not do your merciful deeds before men, to be seen by them. Otherwise you have no reward with your Father in Heaven.

And Jesus said to them, Take heed, and beware the leaven of the Pharisees and of the Sadducees.

Take heed that you do not despise one of these little ones. For I say to you that in Heaven their angels always behold the face of My Father in Heaven.

And Jesus answered and said to them, Take heed that no man deceive you.