續一切經音義 3.205

3.205

暉昱（上許歸反切韻曰光也又作輝輝皆同下余六反爾雅云昱明也切韻云光也說文從日立聲）。

Bright and shining (暉昱: for the upper, xǔ + guī [huī]; the Qieyun says, "Light." Also written as 輝; both are identical. For the lower, yú + liù [yù]; the Erya says, "昱 means bright." The Qieyun says, "Light." The Shuowen derives it from 日 with 立 as phonetic).