Genesis 17:9

“And God said unto Abraham, thou shalt keep my covenant therefore, etc.] Observe the sign or token of it, circumcision, in the manner after related: thou, and thy seed after thee, in their generations; in successive ages until the Messiah come, the end of the law for righteousness.”

“- The Sealing of the Covenant 1. שׁדי shaday, Shaddai, “Irresistible, able to destroy, and by inference to make, Almighty.” שׁדד shādad “be strong, destroy.” This name is found six times in Genesis, and thirty-one times in Job. 5. אברהם 'abrâhām, Abraham, from אברם 'abrām “high-father,” and הם hām the radical part of המין hāmôn a “multitude,” is obtained by a euphonic abbreviation אברהם 'abrâhām, “father of a multitude.” The root רהם rhm is a variation of רום rvm; affording, however, a link of connection in sound and sense with the root המה hāmâh “hum, be tumultuous,” from which comes המון hāmôn a “multitude.” The confluence of the biliterals רם rm and הם hm yields the…”

“17:9-14 God gave circumcision as a confirming sign that reminded all households of loyalty to the covenant.”