佛制比丘六物圖 1.43

1.43

又安鈎約處，揲以方物，本在助牢，而目云「壇子」，非也。《三千威儀》云：「四角安揲。」《四分》云「挽令角正」等。世云「四天王」者，亦非也。《四分》：「肩上須揲，障垢膩處。」

Furthermore, where the hook and fastener are placed, square pieces of cloth are sewn as patches, originally intended to help reinforce them; yet to call them "altars" is incorrect. The Three Thousand Deports says: "Apply patches at the four corners." The Dharmaguptaka-vinaya says "pulling so that the corners are straight," and so forth. What people in the world call the "Four Heavenly Kings" is also incorrect. The Dharmaguptaka-vinaya: "Patches should be placed on the shoulders to guard against dirt and grease."