In parshat Matot God commands bnei Yisrael to wage war against the nation of Midian. Rashi immediately asks the astute question: Why a war of revenge against Midian and not Moav? After all it was Moav who hired Balaam to curse bnei Yisrael, and seduced and provoked bnei Yisrael.

In Parshat Ki Tetze (Dvarim 23:4) We are told “lo yavo amoni umoavi bikhal Hahsem”, “An Ammonite or Moavite should not enter into the congregation of God”. The reason that they are not allowed to convert to Jusaism is given in the next verse, “Because they did not meet you with bread and water when you came out of Egypt”.