Tertullian

“ For circumcision had to be given; but as “a sign,” whence Israel in the last time would have to be distinguished, when, in accordance with their deserts, they should be prohibited from entering the holy city, as we see through the words of the prophets, saying, “Your land is desert; your cities utterly burnt with fire; your country, in your sight, strangers shall eat up; and, deserted and subverted by strange peoples, the daughter of Zion shall be derelict, like a shed in a vineyard, and like a watchhouse in a cucumber-field, and as it were a city which is being stormed.” ”

“ Isaiah in the ensuing words announces, saying, “For from Zion shall go out a law, and the word of the Lord out of Jerusalem, and shall judge among the nations,”—that is, among us, who have been called out of the nations,—“and they shall join to beat their glaives into ploughs, and their lances into sickles; and nations shall not take up glaive against nation, and they shall no more learn to fight.” ”

“ Consider we, accordingly, that one single infant’s compulsory circumcision cannot have prescribed to every people, and founded, as it were, a law for keeping this precept. For God, foreseeing that He was about to give this circumcision to the people of Israel for “a sign,” not for salvation, urges the circumcision of the son of Moses, their future leader, for this reason ”