俱舍論頌疏論本 4.42

4.42

無覆許十二者，欲無覆心異熟生等也，此有十二心所俱生，謂大地十，及與尋、伺。言許者，依薩婆多宗，惡作不通無記，故於無覆無記心唯許有十二。不同經部意，惡作通無記心，無記心中更加惡作故，得有十三，非所許也。

Regarding "The unobscured is accepted as having twelve": this refers to the desire[-realm] unobscured minds born of maturation and so on. These have twelve mental factors co-arising, namely the ten great ground [factors] as well as investigation and scrutiny. The word "accepted" indicates that according to the Sarvāstivāda school, remorse does not extend to the indeterminate; therefore in the unobscured indeterminate mind only twelve are accepted. This differs from the Sautrāntika view that remorse extends to the indeterminate mind; adding remorse to the indeterminate mind yields thirteen, which is not what is accepted here.