'Take Heed' in the Bible

And Pharaoh said unto him, Get thee from me, take heed to thyself, see my face no more; for in the day thou seest my face thou shalt die.

And thou shalt set bounds unto the people round about, saying, Take heed to yourselves, that ye go not up into the mount, or touch the border of it: whosoever toucheth the mount shall be surely put to death:

Take heed to thyself, lest thou make a covenant with the inhabitants of the land whither thou goest, lest it be for a snare in the midst of thee: