瑜伽論記 1.220

1.220

所依中其俱有依，唯識四說，第四正義，第六意識所依七、八，及七、八更互相依。

Among the supports, regarding its simultaneous support (sahabhū-āśraya), the Cheng weishi lun gives four accounts; the fourth is the correct doctrine: the supports of the sixth mental consciousness are the seventh and eighth, and the seventh and eighth are mutually supportive.