俱舍論疏 1.291

1.291

論「此難不然至亦名蘊故」，有部救也。多實成因，有部不許，是不成過。

The treatise says: "This objection is not correct... is also called an aggregate." This is the Sarvāstivādin's rescue. The reason 'composed of multiple real things' is not accepted by the Sarvāstivāda, so it commits the fallacy of the unestablished reason (*asiddhi*).