續一切經音義 7.101

7.101

雷電 [Thunder and lightning]: The upper [character] has the fanqie 嚕迴 (lǔ + huí = léi); the Shuowen writes it as 靁. The Yijing says, “Heaven's thunder: Innocent.” The Lunheng says, “The clash of yin and yang energies.” The lower [character] has the fanqie 堂練 (táng + liàn = diàn); the Yupian says, “Flashing lightning.” The Shiming says, “電 is extinction (𣧠), meaning that as soon as it appears it is extinguished.” The Shuowen says, “The clashing brilliance of yin and yang; it derives from 雨 with [電-雨], sounded as 申.”