Hebrews 6:13

6:13 Now when God made his promise to Abraham, since he could swear by no one greater, he swore by himself,

Hebrews 12:16

12:16 And see to it that no one becomes ¹  an immoral or godless person like Esau, who sold his own birthright for a single meal. ² 

[12:16]  ¹ tn Grk “that there not be any,” continuing from v. 15.

[12:16]  ² sn An allusion to Gen 27:34-41.