Deuteronomy 23:3

Verse 3

An Ammonite or Moabite - These nations were subjected for their impiety and wickedness, (see Deu 23:4 and Deu 23:5), to peculiar disgrace, and on this account were not permitted to hold any office among the Israelites. But this did not disqualify them from being proselytes: Ruth, who was a Moabitess, was married to Boaz, and she became one of the progenitors of our Lord.

Even to their tenth generation - That is, for ever, as the next clause explains; see Neh 13:1.
Copyright information for Clarke