Hebrews 12:14-17 WBT

14 Follow peace with all [men], and holiness, without which no man shall see the Lord:
15 Looking diligently, lest any man fail of the grace of God; lest any root of bitterness springing up, trouble [you], and by it many be defiled;
16 Lest there [be] any fornicator, or profane person, as Esau, who for one morsel of food sold his birth-right.
17 For ye know 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.