'Take Heed' in the Bible

so that Yahweh may establish his word which he spoke concerning me, saying, 'If your sons take heed of their way, to walk before me in faithfulness, with all their heart and with all their soul, no man of yours will be cut off from the throne of Israel.'"

And you must say to him, 'Take heed and be quiet! You must not fear, and your heart must not be faint because of these two stumps of smoldering firebrands, {because of the fierce anger of} Rezin and Aram and the son of Remaliah.