'Take Heed' in the Bible

That the LORD may continue his word which he spoke concerning me, saying, If your children take heed to their way, to walk before me in truth with all their heart and with all their soul, there shall not fail you (said he) a man on the throne of Israel.

Therefore now, LORD God of Israel, keep with your servant David my father that which you promised him, saying, There shall not fail you a man in my sight to sit on the throne of Israel; so that your children take heed to their way, that they walk before me as you have walked before me.