俱舍論疏 10.55

10.55

論「有說三和至說名為觸」，述經部計。彼以經說如是三法聚集和合說名為觸，不說別生，故知三外無別觸也。

The treatise says: "Some say that the coming together of the three [...] is called contact." This relates the Sautrāntika thesis. Because the sūtra states that the gathering and coming together of such three dharmas is called contact, and does not state that it arises separately, they know that apart from the three there is no distinct contact.