Musar su Isaia 43:5

The reason the categories of Mamzer, the Moabite, and Ammonite may not intermarry with Jewish girls is that inasmuch as their place in the scheme of things prior to their becoming converted was in an unholy domain, they are considered to remain under the influence of the forces governing that domain. It is they who symbolize the unholy union between Samael and Lilith. They produce children who do not grow up to embrace G–d's teachings. Ruth Rabbah comments that anyone who marries people who belong to these "peripheral" domains is the subject of the verse in Hoseah 5,7: "They have begotten alien children because they have broken faith with the Lord." When Israel concludes sacred marriages, however, the souls of Israel are elevated from a holy source in accordance with Hosea 14,9: "I become like a verdant cypress. Your fruit is provided by Me." There is an allusion here to the nobility of the souls of Israel originating in the Celestial Regions. [Presumably the fact that in nature a cypress is not a fruit-bearing tree. Ed.] The expression רענן used by the prophet means that the cypress keeps on producing fruit, similar to the meaning of Isaiah 43,5: "I (G–d) will bring your descendants from the East."