are you familiar with the story of ESAU and Jacob ? Esau had a root of bitterness
Hebrews 12:14-16
1 4 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 thereby many be defiled;
16 Lest there be any fornicator, or profane person, as Esau, who for one morsel of meat sold his birthright.
Genesis 25:29-34 Holman Christian Standard Bible (HCSB)
29 Once when Jacob was cooking a stew, Esau came in from the field exhausted. 30 He said to Jacob, “Let me eat some of that red stuff, because I’m exhausted.” That is why he was also named Edom.[
a]
31 Jacob replied, “First sell me your birthright.”
32 “Look,” said Esau, “I’m about to die, so what good is a birthright to me?”
33 Jacob said, “Swear to me first.” So he swore to Jacob and sold his birthright to him. 34 Then Jacob gave bread and lentil stew to Esau; he ate, drank, got up, and went away. So Esau despised his birthright.
read all of chapter 25 -- would be interested in listening instead of reading ?
www.biblegateway.com