俱舍論記 5.18

5.18

「若爾所說同分是何」者，此第四毘婆沙師反徵經部。如我所說同分實有，汝即不許。彼宗所說同分是何？

As for "If that is so, what is the generic conformity you speak of?": this is the fourth, [namely,] the Vaibhāṣikas cross-examining the Sautrāntikas: "Since you do not accept that generic conformity is real as we have stated, what is the generic conformity spoken of by your school?"