Musar for Yevamot 156:6
<big><strong>גמ׳</strong></big> אמר ריש לקיש ממזרת לאחר עשרה דורות מותרת יליף עשירי עשירי מעמוני ומואבי מה להלן נקבות מותרות אף כאן נקבות מותרות
only from those who were begotten<span class="x" onmousemove="('comment',' I.e., whose mother that bore him, not his father, was a native of the land of Canaan. ');"><sup>13</sup></span> in your land, but not from those who dwell in your land.<span class="x" onmousemove="('comment',' Whose father belonged to one of the seven nations of Canaan (v. supra n. 22). Thus it has been shewn that among the gentile nations also the child is ascribed to its father. ');"><sup>14</sup></span> 'If they are converted, follow the more tainted of the two'. In what case? If it be suggested that it refers to an Egyptian<span class="x" onmousemove="('comment',' Who until the third generation is ineligible to enter the congregation. ');"><sup>15</sup></span>