en_tn/deu/23/08.md

The descendants of the third generation that are born to them may belong to the assembly of Yahweh

This "third" is the ordinal number for three. The full meaning of this statement can be made explicit. AT: "If an Edomite or an Egyptian comes to live in the Israelite community, his grandchildren may become full members of that community" (See: rc://en/ta/man/translate/translate-ordinal and rc://en/ta/man/translate/figs-explicit)