首楞嚴義疏注經 2.619

2.619

「又掌出故，合則掌知，離即觸入，臂腕骨髓應亦覺知，入時蹤跡，必有覺心知出知入，自有一物身中往來，何待合知要名為觸？」

"Furthermore, because they come out of the palms, when they join, the palms know it, and when they separate, the contact enters; the arms, wrists, bones, and marrow should also perceive and know the traces when it enters. There must be an aware mind knowing the exit and knowing the entrance; if a thing of its own accord comes and goes within the body, why must it wait to join in order to be known, so as to be called contact?"