How could Isaac slaughter a Passover offering if his son Esau was uncircumcised and the circumcision of one’s sons can prevent participation in the offering?

This source-based Torah study examines: How could Isaac slaughter a Passover offering if his son Esau was uncircumcised and the circumcision of one’s sons can prevent participation in the offering? It follows the canonical Hebrew discussion through the parasha and classical Jewish sources. This localized discovery layer is a concise summary rather than a full translation of the article; practical, halakhic, medical, legal, historical, mystical or empirical claims remain source-framed and subject to the canonical review status.