'Take Heed' in the Bible

that Jehovah may continue His Word which He spoke concerning me, saying, If your sons take heed to their way, to walk before Me in truth with all their heart and with all their soul saying, there shall not be a man of yours cut off from the throne of Israel.

And now, Jehovah, the God of Israel, keep with Your servant David, my father, what You promised him, saying, There shall not be cut off from you a man in My sight to sit on the throne of Israel-- if your sons take heed to their way so that they walk before Me as you have walked before Me.