兜飯舀水 Carrying Rice and Fetching Water
正走間，聽得有人叫「八戒」。八戒擡頭看時，卻是沙僧站在山崖上喊道：「這裡來，這裡來。」及下崖，迎至面前道：「這澗裡好清水不舀，你往那裡去的？」八戒笑道：「我到這裡，見山凹子有個人家，我去化了這一缽乾飯來了。」沙僧道：「飯也用著，只是師父渴得緊了，怎得水去？」八戒道：「要水也容易，你將衣襟來兜著這飯，等我使缽盂去舀水。」正走间，听得有人叫「八戒」。八戒抬头看时，却是沙僧站在山崖上喊道：「这里来，这里来。」及下崖，迎至面前道：「这涧里好清水不舀，你往那里去的？」八戒笑道：「我到这里，见山凹子有个人家，我去化了这一钵干饭来了。」沙僧道：「饭也用着，只是师父渴得紧了，怎得水去？」八戒道：「要水也容易，你将衣襟来兜着这饭，等我使钵盂去舀水。」
逐句解 Line by line
Just as he was walking he heard someone calling out, “Bajie.”
The source sets the name in brackets — 叫「八戒」 — naming the word that is shouted rather than reporting speech, the same citation typography the chapter used for 一個「告」字 at Potalaka. 正走間 takes 間 as the interval, jiān.
Bajie lifted his head to look, and there was Sha Monk standing on the cliff shouting: “Over here! Over here!”
看時 is the ‘on looking’ frame, with 看 at kàn.
He came down off the cliff and met him face to face, saying: “There is good clear water in this ravine and you have drawn none. Where have you been off to?”
那裡去 is the interrogative-locative 那, nǎ. 好清水 takes 好 as the ordinary intensifier hǎo — the graph has no guard, so every occurrence is checked by hand.
Bajie laughed: “When I got here I saw a house in a fold of the hills, and went and begged this bowl of cooked rice.”
乾飯 takes 乾 at gān — rice cooked dry, as against gruel — and not pypinyin's qián, which is the trigram name. 山凹子 takes 子 as the suffix, zi.
Sha Monk said: “The rice will be wanted right enough, but the master's thirst has grown desperate. How are we to come by water?”
得 twice with different readings: 用著 is resultative-attainment 著, zháo, and 渴得緊了 takes 得 as the complement, de, while 怎得水去 takes it as attainment, dé — how are we to get. Both in one nineteen-graph segment.
Bajie said: “Water is easy enough. Take the skirt of your robe and carry the rice in it, and let me use the alms-bowl to draw some.”
兜著 is durative 著, zhe. The arrangement is the last practical thing either of them does before the next passage.
Six segments of ordinary competence. The two disciples find each other, compare what they have, work out that one of them can carry rice in his robe while the other fills the bowl, and settle it without a quarrel. It is the only stretch of the chapter in which anybody cooperates with anybody.
The dramatic irony is doing all the work. Sha Monk teases Bajie for not drawing water; Bajie laughs and produces his bowl of crust; both of them are pleased with themselves. Neither knows that the errand is already pointless, and the reader has known it for two passages. The novel lets the scene run its full length without a single hint dropped inside it.