續一切經音義 7.91

7.91

㝱寐（上莫弄反說文云寐而有覺也從宀從爿夢周禮以日月星辰占六㝱之吉凶也一日正二日[(遻-(這-言))-(前-刖)]三日思四日悟五日憘六日懼也下蜜二反寑也息也從㝱省未聲也經文單作夢俗用亦通也）。

㝱寐 [Dreaming and sleeping]: The upper [character] has the fanqie 莫弄 (mò + nòng = mèng); the Shuowen says, “Awakening while sleeping; it derives from 宀 and 爿 with 夢.” The Zhouli states that by the sun, moon, stars, and constellations one divines the auspiciousness of the six dreams: the first is ordinary, the second is startled, the third is brooding, the fourth is awake, the fifth is joyous, and the sixth is fearful. The lower [character] has the fanqie 蜜二 (mì + èr = mèi); to sleep, to rest; it derives from an abbreviated 㝱 with the phonetic 未. The sūtra text simply writes 夢, which is also commonly accepted in vulgar usage.