妙法蓮華經玄贊 8.188

8.188

贊曰：此令取實。「貿」音莫候反，換易也。交易物為「貿」字，從貝從卯，「卯」音酉。有作「貿」，《玉篇》「歌雅反，人姓也」，非此義。今從莫侯反，不知「貿」字所出。「以貿易」者，用初心小寶珠親近諸佛，聞熏正法更增善根，易取大乘上位福智。大如意珠，貴珍寶也，一得已後常可如意無所乏短，眾德滿故。

The Eulogy says: This directs him to take the real. “Trade” (mao): the fanqie is m- + -ou [mòhòu], meaning exchange. Trading goods uses the character mao (貿), composed of ‘shell’ (貝) and ‘dawning’ (卯); ‘dawning’ is pronounced y- + -ou [yǒu]. There are some who write it [differently], but the Yupian says: “fanqie g- + -ya [gēyǎ], a human surname,” which is not this meaning. Now following m- + -ou [mòhóu], it is not known whence that [other] character mao arose. “To trade” means using the initial small jewel to draw close to all buddhas, hearing and perfuming the true Dharma to further increase good roots, and exchanging it to take the blessing and wisdom of the upper stages of the Mahāyāna. The great wish-fulfilling jewel is a precious gem; once obtained, one can constantly have as one wishes and lack nothing, because all virtues are fully complete.