'Be Careful' in the Bible

Pharaoh said to him, "Get away from me! Be careful to see my face no more; for in the day you see my face you shall die!"

You shall set bounds to the people all around, saying, 'Be careful that you don't go up onto the mountain, or touch its border. Whoever touches the mountain shall be surely put to death.

"Be careful to do all things that I have said to you; and don't invoke the name of other gods, neither let them be heard out of your mouth.

Be careful, lest you make a covenant with the inhabitants of the land where you are going, lest it be for a snare in the midst of you: