창세기 17:27의 미드라쉬

Rabbi Jochanan said: All heathens who come to Israel are circumcised by their own freewill and with their consent, and in the fear of Heaven are they circumcised. We do not believe a proselyte until seven generations (have passed), so that the waters should not return to their source. But slaves are circumcised both by their freewill and with their consent as well as without their consent, and no confidence is placed in slaves. Likewise with all the slaves who were circumcised with our father Abraham, they did not remain true (converts) in Israel, neither they nor their seed, because it is said, "All the men of his house, those born in the house, and those bought with money of the stranger, were circumcised with him" (Gen. 17:27). Why did he circumcise them? Because of purity, so that they should not defile their masters with their food and with their drink, for whosoever eateth with an uncircumcised person is as though he were eating flesh of abomination. All who bathe with the uncircumcised are as though they bathed with carrion, and all who touch an uncircumcised person are as though they touched the dead, for in their lifetime they are like (the) dead; and in their death they are like the carrion of the beast, and their prayer does not come before the Holy One, blessed be He, as it is said, "The dead praise not the Lord" (Ps. 115:17). But Israel who are circumcised, their prayer comes before the Holy One, blessed be He, || like a sweet savour, as it is said, "But we will bless the Lord from this time forth and for evermore. Praise ye the Lord" (Ps. 115:18).