佛說觀佛三昧海經 1.45

1.45

佛告父王及勅阿難：「諦聽諦聽，善思念之！如來今者頭上有八萬四千毛，皆兩向靡右旋而生，分齊分明四抓分明，一一毛孔旋生五光，入前十四色光中。昔我在宮，乳母為我沐頭，時大愛道來至我所：『悉達生時多諸奇特。人若問我：「汝子之髮為長幾許？」我云何答？今當量髮知其尺度。』即勅我申髮，母以尺量。長一丈二尺五寸，放已右旋還成䗍文。

The Buddha addressed his father the king and instructed Ānanda: "Listen attentively, listen attentively, and reflect on it well! On the Tathāgata's head now there are eighty-four thousand hairs, all inclining to both sides and growing curling to the right, their borders distinct and their four divisions clear. From each hair pore, five lights spiral forth and enter into the aforementioned fourteen-colored lights. Formerly, when I was in the palace, my wet nurse was washing my head, at which time Mahāprajāpatī came to where I was, saying: 'When Siddhārtha was born, there were many wonders. If people ask me, "How long is your son's hair?" how shall I answer? Now I shall measure the hair to know its length.' She then instructed me to extend my hair, and my foster mother measured it with a ruler. It was one zhang, two chi, and five cun long; when released, it curled to the right and returned to a spiral form.