佛說觀佛三昧海經 3.15

3.15

「云何觀如來廣長舌相？如來舌者，是十波羅蜜十善報得，其舌根下及舌兩邊，有二寶珠，流注甘露渧舌根上，諸天世人、十地菩薩無此舌相亦無此味。舌上五畫如寶印文，如此上味入印文中，流注上下入琉璃筒。諸佛笑時動其舌根，此味力故舌出五光，五色分明，遶佛七匝還從頂入。佛出舌時，如蓮華葉，上至髮際遍覆佛面，舌下亦有眾雜色脈。如此上味，流入脈中，其味力故變成眾光，有十四色。

"How does one contemplate the Tathāgata's mark of the broad and long tongue? The Tathāgata's tongue was obtained as a karmic reward from the ten pāramitās and the ten virtuous deeds. Under the base of his tongue and on both sides of the tongue, there are two precious gems that pour forth sweet dew (amṛta) dripping onto the base of the tongue. Heavenly beings, mortals, and bodhisattvas of the ten grounds have neither this mark of the tongue nor this taste. On the tongue are five patterns like the markings of a jewelled seal. This supreme taste enters the seal patterns, flowing up and down into lapis lazuli tubes. When the Buddhas smile, they move the base of their tongues. Due to the power of this taste, the tongue emits five rays of light, distinct in five colours, circling the Buddha seven times and then re-entering through his crown. When the Buddha extends his tongue, it is like a lotus petal, reaching up to the hairline and completely covering the Buddha's face. Under the tongue, there are also veins of various variegated colours. This supreme taste flows into the veins, and due to the power of that taste, transforms into numerous beams of light possessing fourteen colours.