'Take Heed' in the Bible

And he said to them, 'Take heed what ye hear; in what measure ye measure, it shall be measured to you; and to you who hear it shall be added;

and he was charging them, saying, 'Take heed, beware of the leaven of the Pharisees, and of the leaven of Herod,'

And Jesus answering them, began to say, 'Take heed lest any one may lead you astray,

and ye, take heed; lo, I have foretold you all things.

Take heed, watch and pray, for ye have not known when the time is;