How could Abraham marry Hagar if she was Egyptian and marriage with an Egyptian is prohibited?

This source-based Torah study examines: How could Abraham marry Hagar if she was Egyptian and marriage with an Egyptian is prohibited? 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.