瑜伽論記 14.192

14.192

欲界有四心者，基云：其五識中唯有三心，無有覆無記心，以相貌不可得也，若在上界，五識中有此無記，此有覆無記唯在意地，見道唯不善，其修道者若發惡行是不善，若潤生生所餘是無記，餘可知。

Regarding "the desire realm has four minds": Ji says: "Among its five consciousnesses there are only three minds; there is no veiled indeterminate mind, because its characteristic appearance cannot be found. If in the higher realms, this indeterminate mind exists within the five consciousnesses. This veiled indeterminate mind exists only in the mental stage; in the path of seeing it is exclusively unwholesome; as for that in the path of cultivation, if it initiates evil conduct it is unwholesome; if it moistens rebirth, what remains is indeterminate. The rest can be understood."