וְעָרֵ֣ל ׀ זָכָ֗ר אֲשֶׁ֤ר לֹֽא־יִמּוֹל֙ אֶת־בְּשַׂ֣ר עָרְלָת֔וֹ וְנִכְרְתָ֛ה הַנֶּ֥פֶשׁ הַהִ֖וא מֵעַמֶּ֑יהָ אֶת־בְּרִיתִ֖י הֵפַֽר׃ (ס)
И необрезанный мужчина, который не обрезан во плоти крайней плоти своей, отрубит эту душу от народа своего; Он нарушил Мой завет.'
The Midrash of Philo
Why is it that he pronounces a sentence of death on an infant, saying, "Every male child who is not circumcised, who has not been circumcised (or, as the Greek has it, who shall not be circumcised) in the flesh of his foreskin on the eighth day, that soul shall be cut off from his generation?"(Genesis 17:14).