Be contemplative, lest anyone lack the grace of God, lest any root of bitterness spring up and impede you, and by it, many might be defiled
Other versions
King James Version
Looking diligently lest any man fail of the grace of God; lest any root of bitterness springing up trouble you, and thereby many be defiled; English Standard Version
See to it that no one fails to obtain the grace of God; that no "root of bitterness" springs up and causes trouble, and by it many become defiled;New International Version
See to it that no one misses the grace of God and that no bitter root grows up to cause trouble and defile many.