Rare character in a Manichaean text

𭿔 is read by some editors as a rare old form of 笑 (“laugh”), though another transcription gives 嗟. It appears in a Chinese Manichaean scripture—a text from a religion that began in Persia—preserved in a Tang-era manuscript found at Dunhuang, China. The passage advises teachers not to exploit a debate opponent’s loss by laughing at them.