וְגֵ֥ר לֹא־תוֹנֶ֖ה וְלֹ֣א תִלְחָצֶ֑נּוּ כִּֽי־גֵרִ֥ים הֱיִיתֶ֖ם בְּאֶ֥רֶץ מִצְרָֽיִם׃
און אַ פֿרעמדן זאָלסטו ניט קריװדען, און זאָלסט אים ניט דריקן, װאָרום פֿרעמדע זײַט איר געװען אין לאַנד מִצרַיִם.
Mishnah Bava Metzia
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.”