Gen 17:9

“ואתה AND AS FOR THEE — This ו (of ואתה) connects this verse with the preceding matter (v. Gensis 17:4, thus setting ואתה of here in contrast with the ואני of there): “As for Me, behold My covenant is with thee” — “and as for thee, thou shalt be careful to keep it”. And what constitutes the “keeping” of it? THIS IS MY COVENANT WHICH YE SHALL KEEP… EVERY MALE AMONGST YOU [SHALL BE CIRCUMCISED].”

“‘VE’ATAH’ (AND AS FOR THEE), THOU SHALT KEEP MY COVENANT. Rashi commented, “The vav of ve’atah connects the verse with the preceding matter [in Verse 4]: ‘As for Me behold My covenant is with thee, and as for thee, thou shalt be careful to keep it.’ And what constitutes this ‘keeping’ of it? This is My covenant, which you shall keep, between Me and you — this applies to those who were then alive; and thy seed after thee — this applies to those who are yet to be born.” The Rabbi is correct in his interpretation of the plain meaning of the verse. Now they have said concerning the reason for the commandment of circumcision that He has thereby placed a reminder in the organ of lust, which is the source of much trouble and sin, in order that it should not be used excepting where it is commandatory and permissible. By way of truth,, Note 63. the meaning of the verse, Behold, My covenant is with thee, is similar in meaning to the verses: Behold, I am with thee; And He said, Certainly, I will be with thee; The Eternal our G-d be with us. He is thus saying that the covenant will be with him, and therefore he will be fruitful and multiply. After that He commanded that Abraham keep this covenant, and the circumcision will be as a sign of the covenant. Thus it is that this “sign” is as “the sign” of the Sabbath,. (Exodus 31:17.) and therefore circumcision sets aside the Sabbath. Understand this.”

“On the part of Abraham (ואתּה thou, the antithesis to אני, as for me, Gen 17:4) God required that he and his descendants in all generations should keep the covenant, and that as a sign he should circumcise himself and every male in his house. המּול Niph. of מוּל, and נמלתּם perf. Niph. for נמלּתם, from מלל = מוּל. As the sign of the covenant, circumcision is called in Gen 17:13, "the covenant in the flesh," so far as the nature of the covenant was manifested in the flesh. It was to be extended not only to the seed, the lineal descendants of Abraham, but to all the males in his house, even to every foreign slave not belonging to the seed of Abram, whether born in the house or acquired (i.e., bought) with money, and to the "son of eight days," i.e., the male child eight days old; with the threat that the uncircumcised should be exterminated from his people, because by neglecting circumcision he had broken the covenant with God. The form of speech ההיא הנּפשׁ נכרתה, by which many of the laws are enforced (cf. Exo 12:15, Exo 12:19; Lev 7:20-21, Lev 7:25, etc.), denotes not rejection from the nation, or banishment, but death, whether by a direct judgment from God, an untimely death at the hand of God, or by the punishment of death inflicted by the congregation or the magistrates, and that whether יוּמת מות is added, as in Exo 31:14, etc., or not. This is very evident from Lev 17:9-10, where the extermination to be effected by the authorities is distinguished from that to be executed by God Himself (see my biblische Archologie ii. 153, 1). In this sense we sometimes find, in the place of the earlier expression "from his people," i.e., his nation, such expressions as "from among his people" (Lev 17:4, Lev 17:10; Num 15:30), "from Israel" (Exo 12:15; Num 19:13), "from the congregation of Israel" (Exo 12:19); and instead of "that soul," in Lev 17:4, Lev 17:9 (cf. Exo 30:33, Exo 30:38), we find "that man."”