בָּנִ֛ים אֲשֶׁר־יִוָּלְד֥וּ לָהֶ֖ם דּ֣וֹר שְׁלִישִׁ֑י יָבֹ֥א לָהֶ֖ם בִּקְהַ֥ל יְהוָֽה׃ (ס)
The children of the third generation that are born unto them may enter into the assembly of the LORD.
Targum Jonathan on Deuteronomy
The children who are born to them in the third generation shalt be fit to take wives from the people of the congregation of the Lord.