'Take Heed' in the Bible

Now, LORD God of Israel, make good unto my father David thy servant that which thou hast promised him, saying, 'Thou shalt not be without one or other in my sight that shall sit upon the seat of Israel. Of this condition, yet: if thy children will take heed to their ways to walk in my law, as thou hast walked before me.'

and said to the judges, "Take heed what ye do: for ye be not judges in the law of man, but of the LORD - which is with you in the words of the law.

Wherefore, let the fear of the LORD be with you, and take heed and do it. For there is no unrighteousness in the LORD our God nor regarding of persons, nor taking of rewards."