'Take Heed' in the Bible

For they shall eat, and not have enough: they shall commit whoredom, and shall not increase: because they have left off to take heed to the LORD.

O ye priests, hear this; take heed, O thou household of Israel; give ear, O thou kingly house. For this punishment will come upon you, that are become a snare unto Mizphah, and a spread net unto the mount of Tabor.