Genesis 17:10

“This [is] my covenant, etc.] The token of it, for the promise itself was given before, which is more properly the covenant; circumcision is so called in an improper sense, being only the sign of it: which ye shall keep between me and you, and thy seed after thee; which was to be observed by Abraham, and the males in his house then with him, as Ishmael, and those that were born in his house, or bought with his money, and by his posterity in succeeding ages, and it is what follows: every man child among you shall be circumcised; this was the first institution of circumcision, and it was an institution of God, and not of man. Indeed Herodotus says f1067, that “the Colchi, Egyptians, and…”

“Every man child among you shall be circumcised--This was the sign in the Old Testament Church as baptism is in the New, and hence the covenant is called "covenant of circumcision" (Act 7:8; Rom 4:11). The terms of the covenant were these: on the one hand Abraham and his seed were to observe the right of circumcision; and on the other, God promised, in the event of such observance, to give them Canaan for a perpetual possession, to be a God to him and his posterity, and that in him and his seed all nations should be blessed.”

“- 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…”