Musar su Osea 5:78

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."

One must know that this demon Machalas and her hosts, mentioned in the previous chapter, sometimes appear to a man even when he is awake. She comes to him in the form of a beautiful woman with a smiling countenance. She laughs with him and bears him children called, “foreign sons” (Hoshea 5:7) or “destructive sons” (Yeshayahu 1:4). And in the end she kills him along with his offspring and his entire family. We have heard tell of just such an incident that took place in our own time. I will relate to you, my friend, how the matter fell out: It happened during the years 5441 and 5442. On a busy street in the holy community of Posen there was a solitary stone house with a cellar that was always kept locked and no man was allowed to enter. One day a certain young man did go in and about a quarter of an hour later the residents of the house found him lying dead on the threshold. No one could ascertain the reason for his death. About two years after the young man’s death malignant spirits [chitzonim] began to frequent the outbuilding where all the domestic chores were done. Whenever anyone prepared food to place on the stove they would later find filled with dirt and ashes, rendering it unfit for consumption.