佛說觀佛三昧海經 1.48

1.48

The Tathāgata then extended his hair with his hand: from the Nyagrodhārāma to his father the king's palace, like dark beryl, it encircled the city seven times. Within the Buddha's hair, the great assembly all saw lights of various colors beyond description; each of those lights shone everywhere upon everything, appearing the color of dark beryl. Within that beryl color, there were transformation Buddhas beyond reckoning. Having displayed these marks, he gathered the hair and retracted the light; curling to the right and gracefully coiling, it settled back upon the Buddha's crown, instantly forming spirals. This is called the Tathāgata's true mark of the hair.