Mamzer Learning Torah

On that day Judah, an Ammonite convert, came and stood before them in the house of study. He said to them: Do I have the right to enter into the assembly? Rabban Gamaliel said to him: you are forbidden. Rabbi Joshua said to him: you are permitted. Rabban Gamaliel said to him: the verse says, "An Ammonite or a Moabite shall not enter into the assembly of the Lord: even to the tenth generation" (Deuteronomy 23:4). R. Joshua said to him: But are the Ammonites and Moabites still in their own territory? Sanheriv, the king of Assyria, has long since come up and mingled all the nations, as it is said: "In that I have removed the bounds of the peoples, and have robbed their treasures, and have brought down as one mighty the inhabitants" (Isaiah 10:1. Rabban Gamaliel said to him: the verse says, "But afterward I will bring back the captivity of the children of Ammon," (Jeremiah 49:6) they have already returned. Rabbi Joshua said to him: [another] verse says, "I will return the captivity of my people Israel and Judah" (Jeremiah 30:3). Yet they have not yet returned. So they permitted him to enter the assembly.

And bring them closer to Torah. How so? This teaches us that a person should prevail upon others and bring them under the wings of the Divine Presence, just as Abraham prevailed upon those around him and brought them under the wings of the Divine Presence. [And not only Abraham, but also Sarah, as it says (Genesis 12:5), “Abram took his wife Sarai, and his nephew Lot, and all of their possessions, and the souls they had made in Haran.” But even if everyone in the world got together, they would be unable to create even one mosquito! So what does it mean when it says, “the souls they had made in Haran”? It teaches us that the Holy Blessed One considered it as if they had actually made new souls.
When a person does not give part of what he earns to his fellows in this world, then he will not be given anything in the World to Come, as it says (Ecclesiastes 4:1), “Look at the tears of the oppressed, and they have no comforter. Power is in the hand of their oppressors, and they have no comforter.” Why does it say “they have no comforter” twice? This refers to people who eat and drink in this world, and their sons and daughters are successful, but in the World to Come they have [nothing and they have no] comforter. For if a person has something stolen from him in this world, or if someone he knows dies, then his children, siblings, and other relatives come and comfort him. Could it be that the same is true in the World to Come? That is why the verse then says (Ecclesiastes 4:8), “He has neither son nor brother.”
So, too, with someone whose sexual transgression produces a mamzer [a child born of certain forbidden sexual relations]. They say to him: Empty one! You have ruined yourself and you have ruined him as well! [For this mamzer would have wanted to study Torah with the rest of the students] who sit and study in Jerusalem. But this mamzer would go with them only up to Ashdod, and then would stop there and say: Woe is me! If I were not a mamzer, I would have gone to sit and study among the students whom I have been studying with until now. But because I am a mamzer, I cannot sit and study among these students. For a mamzer cannot enter Jerusalem at all, as it says (Zechariah 9:6), “The mamzer will stay in Ashdod, (and I will cut off the pride of the Philistines.”

And bring them closer to Torah. How so? This teaches us that a person should prevail upon others and bring them under the wings of the Divine Presence, just as Abraham prevailed upon those around him and brought them under the wings of the Divine Presence. [And not only Abraham, but also Sarah, as it says (Genesis 12:5), “Abram took his wife Sarai, and his nephew Lot, and all of their possessions, and the souls they had made in Haran.” But even if everyone in the world got together, they would be unable to create even one mosquito! So what does it mean when it says, “the souls they had made in Haran”? It teaches us that the Holy Blessed One considered it as if they had actually made new souls.
When a person does not give part of what he earns to his fellows in this world, then he will not be given anything in the World to Come, as it says (Ecclesiastes 4:1), “Look at the tears of the oppressed, and they have no comforter. Power is in the hand of their oppressors, and they have no comforter.” Why does it say “they have no comforter” twice? This refers to people who eat and drink in this world, and their sons and daughters are successful, but in the World to Come they have [nothing and they have no] comforter. For if a person has something stolen from him in this world, or if someone he knows dies, then his children, siblings, and other relatives come and comfort him. Could it be that the same is true in the World to Come? That is why the verse then says (Ecclesiastes 4:8), “He has neither son nor brother.”
So, too, with someone whose sexual transgression produces a mamzer [a child born of certain forbidden sexual relations]. They say to him: Empty one! You have ruined yourself and you have ruined him as well! [For this mamzer would have wanted to study Torah with the rest of the students] who sit and study in Jerusalem. But this mamzer would go with them only up to Ashdod, and then would stop there and say: Woe is me! If I were not a mamzer, I would have gone to sit and study among the students whom I have been studying with until now. But because I am a mamzer, I cannot sit and study among these students. For a mamzer cannot enter Jerusalem at all, as it says (Zechariah 9:6), “The mamzer will stay in Ashdod, (and I will cut off the pride of the Philistines.”

A Sefer Torah that was written by a mamzer, there are those who rule unfit. (And this is the same for a ger toshav) (Mordechai, end of Halachot Ketanot)

3. All count towards the seven who are called up, even a woman and a child who knows who we bless, but the Sages said: A woman shall not read [the Torah] in public, out of concern for the honor of the community. RAMA: And these specifically may be include in those who read, but they may not be all women or children (who are listening) (Ra"n and Riva"sh). And a Canaanite slave is treated as a woman, but if his mother is Jewish he may go up [to read the Torah] (Hagahot Maimoniyot, Prayer and the Priestly Blessing, ch. 12). And it is prohibited to read with one's head uncovered. And there is no prohibition to call up a respected ignoramus, who is rich and powerful, before learned men; for it is not disrespectful to the learned men, rather an honor to the Torah which is honored by great men (Ohr Zaru'a). And a mamzer may go up to [read from] the Torah (Mahar"a of Prague). And see above, Siman 136, for the order of those who are called up.