摩訶止觀 8.178

8.178

𢟋惕發者：若人坐時，或緣頭面，或緣人身體，墮而復上，翻覆不已。雖無苦痛，而屑屑難耐。或鑽人耳、眼、鼻，或抱持擊攊，似如有物，捉不可得，驅已復來，啾㗫作聲鬧人耳。此鬼面似琵琶，四目兩口（云云）。

As for the manifestation of the chuti: when a person is sitting [in meditation], it may cling to the head and face, or cling to the person's body, falling and climbing back up, continually tossing and turning. Although there is no severe pain, it is irritating and hard to bear. Or it may drill into the person's ears, eyes, or nose, or embrace, strike, and poke them, as if something were there, yet it cannot be grasped; driven away, it returns again, chattering and twittering to disturb the person's ears. This ghost has a face resembling a lute, with four eyes and two mouths (and so forth).