'Take Heed' in the Bible

according to the free gift of God bestowed upon me, I, as a skilful architect, have laid the foundation, and another builds thereon. but let every man take heed how he builds thereupon.

wherefore let him that thinks he stands firm, take heed lest he fall.

but if you bite and tear one another, take heed that you be not consumed by one another.

Take heed, brethren, lest there be in any of you such incredulity as to make you desert the living God.