一切經音義 4.209

4.209

荏苒（上而枕反考聲云草荏苒者漸次相因經歷時日謂之荏苒經作苒俗字也）。

荏苒 (The first character has the fanqie: 而枕. The Kaosheng says: "The flourishing growth of grass occurring gradually and successionally over the passage of days and months is called renran (荏苒)." In the sūtra it is written as 苒, which is a vulgar character).