'Take Heed' in the Bible

And he said unto them, "Take heed what ye hear. With what measure ye mete, with the same shall it be measured unto you again. And unto you that hear, shall more be given.

And he charged them, saying, "Take heed, and beware of the leaven of the Pharisees, and of the leaven of Herod."

And Jesus answered them, and began to say, "Take heed, lest any man deceive you.

Take heed: watch, and pray, for ye know not when the time is: