Rujukan Mishnah untuk Keluaran 22:21: Mishnah Ketubot & Mishnah Bava Metzia

And in the following cases there is no fine:If a man had intercourse with a female convert, a female captive or a slave-woman, who was redeemed, converted or freed after the age of three years and a day. Rabbi Judah says: a female captive who was redeemed is considered to be in her state of holiness (a virgin) even if she is of majority age. A man who had intercourse with his daughter, his daughter's daughter, his son's daughter, his wife's daughter, her son's daughter or her daughter's daughter does not pay the fine, because he forfeits his life, for his death is in the hands of the court, and he who forfeits his life pays no monetary fine for it is said, “And yet no other damage ensues he shall be fined” (Exodus 21:2.

Just as the laws of fraud apply to buying and selling, so to do they apply to the spoken word. One may not say, “How much is this object?, if he does not wish to buy it. If one had repented, another should not say to him, “Remember your earlier deeds”. If one descended from converts, another should not say to him, “Remember the deeds of your ancestors”. For it is said (Exodus 22:21), “And a stranger you shall not wrong or oppress.”