成唯識論了義燈 7.254

7.254

答：有二釋。一云不得，此迴趣者必不定姓，是鈍根故。又復《瑜伽》、《雜集》俱云此類是部行故。

Answer: There are two explanations. One says that one does not obtain it, because this one who turns is necessarily of indeterminate gotra and is of dull faculties. Moreover, both the Yogācārabhūmi and the Samuccaya state that this class is group-dwelling.