Kidushin4: 7
רַבִּי אֱלִיעֶזֶר בֶּן יַעֲקֹב אוֹמֵר: יִשְׂרָאֵל שֶׁנָּשָׂא גִיּוֹרֶת — בִּתּוֹ כְּשֵׁרָה לַכְּהֻנָּה; וְגֵר שֶׁנָּשָׂא בַת יִשְׂרָאֵל — בִּתּוֹ כְּשֵׁרָה לַכְּהֻנָּה. אֲבָל גֵּר שֶׁנָּשָׂא גִיּוֹרֶת — בִּתּוֹ פְּסוּלָה לַכְּהֻנָּה. אֶחָד גֵּר וְאֶחָד עֲבָדִים מְשֻׁחְרָרִים, אֲפִלּוּ עַד עֲשָׂרָה דוֹרוֹת, עַד שֶׁתְּהֵא אִמּוֹ מִיִּשְׂרָאֵל. רַבִּי יוֹסֵי אוֹמֵר: אַף גֵּר שֶׁנָּשָׂא גִיּוֹרֶת בִּתּוֹ כְּשֵׁרָה לַכְּהֻנָּה.
R’ Eliezer ben Yaakov says: [If] a non-Kohen married a proselyte, his daughter is qualified to marry a Kohen; [if] a proselyte married the daughter of a regular Jew, his daughter is qualified to marry a Kohen. However, [if] a proselyte married a proselyte, his daughter is disqualified from marrying a Kohen. [This applies to] both a proselyte and freedmen, even until ten generations, unless his mother is of Jewish descent. R’ Yose says: Even [if] a proselyte married a proselyte, his daughter is qualified to marry a Kohen.