不勞再宴 No Need Of A Second Feast
三藏謝了盛宴。國王又留住道：「這一席聊表聖僧獲怪之功。」教光祿寺：「快翻席到建章宮裡，再請聖僧定捕賊首、取寶歸塔之計。」三藏道：「既要捕賊取寶，不勞再宴。貧僧等就此辭王，就擒捉妖怪去也。」國王不肯，一定請到建章宮，又吃了一席。三藏谢了盛宴。国王又留住道：「这一席聊表圣僧获怪之功。」教光禄寺：「快翻席到建章宫里，再请圣僧定捕贼首、取宝归塔之计。」三藏道：「既要捕贼取宝，不劳再宴。贫僧等就此辞王，就擒捉妖怪去也。」国王不肯，一定请到建章宫，又吃了一席。
逐句解 Line by line
Tripitaka gave thanks for the grand banquet.
Six characters, and a short narrator clause of this kind stands on its own line. 盛宴 takes 盛 as shèng, abundant.
The king detained him again. "This one table is a slight token of the holy monk's merit in taking the fiends."
聊表 is the formula for a gift offered as a token and nothing more — a mere expression of. The king is using it of a banquet of a hundred tables.
He told the Court of Imperial Entertainments, "Move the tables quickly to the Jianzhang Palace, and invite the holy monk again, to settle the plan for taking the chief of the thieves and getting the treasure back to the pagoda."
建章宮 is the Jianzhang Palace, built by Emperor Wu of the Han at Chang'an — the second Han palace this chapter drops into a western kingdom, after the 未央宮 of the rhapsody at the city gate. 翻席 is shifting a feast bodily into another hall, tables and all.
Tripitaka said, "Since the thief is to be taken and the treasure recovered, there is no need to trouble with a second banquet.
不勞 is the polite refusal: do not put yourself to the trouble. He has been at table since before noon, and the thing he came for is still at the bottom of a pool.
"This poor monk and his disciples will take leave of Your Majesty here, and go at once to catch the fiends."
就此辭王 — take leave right here, right now. It is the second time in the chapter he has tried to move the business along and been overruled by hospitality.
The king would not have it, but insisted on inviting them to the Jianzhang Palace, and they ate another table's worth.
一定 here does not mean certainly but insistently, and the 一 falls to yí before the falling tone of 定. 又吃了一席 is the whole of the second banquet in five characters, where the first was given six passages.
The chapter's last obstacle is not a demon but a host. Tripitaka thanks the king, is detained, proposes to leave, is refused, and eats a second banquet in a different palace. The novel gave the first feast six passages and disposes of the second in five characters.
It is also the second Han palace transplanted into this kingdom. The rhapsody at the city gate had trees growing outside the Weiyang Palace; the tables are now carried across to the Jianzhang. Both were built at Chang'an, and the pilgrims are some thousands of lǐ west of it.