俱舍論頌疏論本 6.13

6.13

釋曰：俱有者，俱時而有也。互為果者，釋俱有因也。論云：「若法更互為士用果，彼法更互為俱有因。」解云：俱有作用，俱有即因，名俱有因，持業釋也。若果與因俱名為俱有，俱有之因，依主釋也。

The commentary explains: 'Coexistent' means existing at the same time. 'Mutually effects' explains the coexistent cause. The treatise states: 'If dharmas are mutually virile fruits (puruṣakāraphala), those dharmas are mutually coexistent causes.' The explanation says: Possessing coexistent function, what is coexistent is itself the cause, hence called 'coexistent cause'—this is a karmadhāraya compound. Or, if the fruit and cause are coexistent, it means the cause of the coexistent—this is a tatpuruṣa compound.