Hebrews 12:15
King James Version
“Looking diligently lest any man fail of the grace of God; lest any root of bitterness springing up trouble and thereby many be defiled;”
Context
12Wherefore lift up the hands which hang down, and the feeble knees;
13And make straight paths for your feet, lest that which is lame be turned out of the way; but let it rather be healed.
14Follow peace with all and holiness, without which no man shall see the Lord:
15Looking diligently lest any man fail of the grace of God; lest any root of bitterness springing up trouble and thereby many be defiled;
16Lest there any fornicator, or profane person, as Esau, who for one morsel of meat sold his birthright.
17For ye know how that afterward, when he would have inherited the blessing, he was rejected: for he found no place of repentance, though he sought it carefully with tears.
18For ye are not come unto the mount that might be touched, and that burned with fire, nor unto blackness, and darkness, and tempest,