Hebrews 12:15-19

See to it that no one comes short of the grace of God; that no root of bitterness springing up causes trouble, and by it many become defiled;

that there be no sexually immoral or godless person like Esau, who sold his own birthright for a single meal.

For you know that even afterward, when he wanted to inherit the blessing, he was rejected, for he found no place for repentance, though he sought for it with tears. Contrast of Sinai and Zion

For you have not come to a mountain that can be touched and to a blazing fire, and to darkness and gloom and whirlwind,

and to the blast of a trumpet and the sound of words, which sound was such that those who heard begged that no further word be spoken to them.