成唯識論演祕 4.297

4.297

三位無七家亦同安惠成八無依，亦作此義亦顯安惠三位無七。

The masters who hold that the seventh does not exist in the three states, just like Sthiramati, establish that the eighth has no basis; 'also adopts this meaning' also shows that Sthiramati holds the seventh does not exist in the three states.