Hebrews 12:16-17 See that no one is sexually immoral, or is godless like Esau, who for a single meal sold his inheritance rights as the oldest son. Afterward, as you know, when he wanted to inherit this blessing, he was rejected. He could bring about no change in mind, though he sought the blessings with tears.
In Genesis 25:29-34, there is the story of Esau who had little respect for the value of his birth rights as the oldest son. In Old Testament times, this was considered contemptible and sinful. This story is given to us to illustrate that when sins are harbored for long, the time may come when a person seeks forgiveness and restoration. However, the time may be too late because they may not be able to sincerely repent. To repent means to change one’s ways. A well practiced habit is always harder to break than a new habit. The faster we come to Christ for forgiveness and change our ways, the less likely we are to become hardened to the patterns of sin as was Esau.