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那大圣在柱根下爬蹉,忽惊动八戒。......他见面前无人,就弄神通:顺出棒来,吹口仙气,叫"变!"即变做一个纯钢的锉儿,扳过那颈项的圈子,三五锉,锉做两段;扳开锉口,出来,拔了一根毫毛,叫变做 , , 真身 却幌一幌 , , 立在旁边。 又在道:"不好了!不好了! 拴的 ,吊的是正身!"老魔停杯便问:"那猪八戒吆喝的是甚么?"行者已变做小妖,上前道:"猪八戒撺道行者教变化走了罢,他不肯走,在那里吆喝哩。"二魔道:"还说猪八戒老实,原来这等不老实!该打二十多嘴棍!" 这行者就去拿条棍来打,八戒道:"你打轻些儿,若重了些儿,我又喊起,我认得你!"行者道:"老变化,也只为你们,你怎么倒走了?这一洞里妖精,都认不得,怎的偏你认得?" 八戒道 :"你虽变了头脸,还 不曾变 得 屁股 。那 不是?我 是你。"行者随往后面,演到厨中,锅底上摸了一把,将两臀擦黑,行至前边。八戒看见又笑道:"那个猴子去那里混了这一会,弄做个黑屁股来了。"
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