背了是非 They Carried The Tale Here
蜘蛛精在盤絲洞要害我師父,是我與師弟八戒、沙僧救解得脫。那蜘蛛精走到他這裡,背了是非,說我等有欺騙之意。道士將毒藥茶藥倒我師父、師弟共三人,連馬四口,陷在他觀裡。蜘蛛精在盘丝洞要害我师父,是我与师弟八戒、沙僧救解得脱。那蜘蛛精走到他这里,背了是非,说我等有欺骗之意。道士将毒药茶药倒我师父、师弟共三人,连马四口,陷在他观里。
逐句解 Line by line
"The spider spirits meant to do my master harm at Gossamer Cave, and it was I and my brothers Eight Rules and Sha Monk who got him free."
救解得脫 takes 得 as de, because 脫 after it is a result: rescued him free. When 得 is instead fused onto a verb of perception, or follows a modal, it keeps the full dé. 救解 itself keeps 解 as jiě, to loosen or release — a different word from the 解數 of the fight verse, where the same character was xiè.
"The spider spirits came here to him, carried their tale, and said we had meant to cheat them."
背是非 is to carry gossip from one place to another — 是非 being literally rights-and-wrongs, and by extension the quarrels people make of them. The reading stays bèi: the corpus seals this character five times and 中原音韻 files it in one band only, so the bēi of carrying on one's back is a later development that has no place here.
"The Daoist drugged my master and my brothers down with poisoned tea — three of them, four counting the horse — and they are trapped inside his abbey."
藥倒 once more: 藥 as a verb, to drug, with 倒 as dǎo, the falling result. This is the third of the chapter's five. 四口 counts living beings with 口, mouths — and the horse gets counted, which is both a way of reckoning a household and a small joke.
This is the chapter's own summary, delivered by a character, and it is a good test of how much of it he has understood. He has the sequence right: the spiders attacked, they were beaten off, they came here, they complained, the Daoist acted. What he does not have is why any of it worked.
背了是非 is the phrase to keep. Carrying tales — moving a quarrel from the place where it happened to a place where it can be acted on — is exactly what the seven did, and it is the mechanism of the whole plot. Nothing in this chapter would have occurred if seven people had not walked twenty li to complain.
And the horse gets counted. 連馬四口 — four mouths counting the horse — is Pilgrim doing the arithmetic of a household, and it is the closest the chapter comes to acknowledging that a party of pilgrims is a small family with livestock. The animal is poisoned too, and nobody has mentioned it until now.