'Beware' in the Bible

“Beware of the false prophets, [teachers] who come to you dressed as sheep [appearing gentle and innocent], but inwardly are ravenous wolves.

How is it that you fail to understand that I was not talking to you about bread? But beware of the leaven of the Pharisees and Sadducees.”

Then they understood that He did not tell them to beware of the leaven of bread, but of the [false] teaching of the Pharisees and Sadducees.

“See that you do not despise or think less of one of these little ones, for I say to you that their angels in heaven [are in the presence of and] continually look upon the face of My Father who is in heaven.

Jesus repeatedly ordered them, saying, “Watch out! Beware of the leaven of the Pharisees and the leaven of Herod.”

In [the course of] His teaching He was saying, “Beware of the scribes, who like to walk around in long robes [displaying their prominence], and like to receive respectful greetings in the market places,

“Beware of the scribes, who like to walk around in long robes [displaying their prominence], and love respectful greetings in the [crowded] market places, and chief seats in the synagogues and places of honor at banquets.

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

Take care, brothers and sisters, that there not be in any one of you a wicked, unbelieving heart [which refuses to trust and rely on the Lord, a heart] that turns away from the living God.