1
למען אשר לא ילמדו. הָא אִם עָשׂוּ תְשׁוּבָה וּמִתְגַיְּרִין אַתָּה רַשַּׁאי לְקַבְּלָם (שם): למען אשר לא ילמדו [BUT THOU SHALT DOOM THEM TO DESTRUCTION …] THAT THEY TEACH YOU NOT TO DO [AFTER THEIR ABOMINATIONS] — Consequently if they repent of their abominations and wish to become proselytes you are allowed to accept them as such (Sifrei Devarim 202:1).