Don't keep a third generation Egyptian convert from marrying into the Jewish people

This mitzvah teaches that while Egyptians (and Edomites) who convert are restricted from marrying into the Jewish people for two generations, their descendants in the third generation are fully permitted. The Torah emphasizes Israel’s obligation to maintain justice, even toward nations with whom we had a difficult past, once the prescribed generational boundary has passed.

Commentary & Classical Explanation:

• Rambam (Hilchot Issurei Bi’ah 12:23): Codifies that Egyptians and Edomites may marry freely into Israel starting with the third generation after conversion.
• Sefer HaChinuch (Mitzvah 564): The root is to cultivate fairness and not hold descendants forever accountable for the sins of their ancestors.
• Talmud (Yevamot 76a): Explains the distinction between Ammon/Moav (who are forbidden forever) and Egypt/Edom (who are permitted after three generations).