俱舍論頌疏論本 10.72

10.72

有漏通三界者，觸、思等三雖通無漏，而今食體唯取有漏，資益有故。若無漏法，破壞諸有，故非食也。觸等三食通三界攝。

'Being contaminated, they extend to the three realms': although contact, volition, and the third extend to the uncontaminated, here the nature of food takes only the contaminated, because it nourishes existence. If they were uncontaminated dharmas, they would destroy existences; therefore they are not food. The three foods of contact and so forth are subsumed across the three realms.