Hebrews 2:1

For this reason we ought to pay the more earnest heed to the things which we have heard, for fear we should drift away from them.

Hebrews 12:15

Be carefully on your guard lest there be any one who falls back from the grace of God; lest any root bearing bitter fruit spring up and cause trouble among you, and through it the whole brotherhood be defiled;

Treasury of Scripture Knowledge

Summary

But Jehu took no heed to walk in the law of the LORD God of Israel with all his heart: for he departed not from the sins of Jeroboam, which made Israel to sin.

Took no heed

Bible References

Took no heed

Hebrews 2:1
For this reason we ought to pay the more earnest heed to the things which we have heard, for fear we should drift away from them.
Hebrews 12:15
Be carefully on your guard lest there be any one who falls back from the grace of God; lest any root bearing bitter fruit spring up and cause trouble among you, and through it the whole brotherhood be defiled;