法苑珠林 38.57

38.57

勅請舍利往東都入內供養。時西域又獻佛束頂骨至京師。人或見者。高五寸闊四寸許。黃紫色。又追京師僧七人往東都入內行道。

...requested the śarīra to proceed to the Eastern Capital to enter the palace for offerings. At that time, the Western Regions also offered the Buddha's bundled parietal bone [uṣṇīṣa] to the capital. Those among the people who saw it [described it as] about five inches high and four inches wide, of a yellowish-purple colour. Furthermore, seven monks from the capital were summoned to proceed to the Eastern Capital to enter the palace and practice the Path.