首楞嚴義疏注經 4.525

4.525

「由離、合等二種相摩，於妙圓中粘湛發覺，覺精映觸，摶觸成根，根元目為清淨四大，因名身體。如腰鼓顙，浮根四塵流逸奔觸。」

"Due to the two kinds of mutual friction, such as separation and contact, within the wondrously perfect [nature] it adheres to the still clarity and generates bodily feeling. The essence of feeling reflects upon tangible objects, moulding contact to become a faculty. The root of the faculty is designated as the pure four great elements, and is therefore named the body. Resembling an hourglass drum, the four dusts of the floating faculty drift out and rush after contact."