釘鈀放光 The Rake Gives Off Light
行者復身爬上宮殿觀看。左首下有光彩森森，乃是八戒的釘鈀放光。使個隱身法，將鈀偷出，到牌樓下，叫聲：「八戒，接兵器。」行者复身爬上宫殿观看。左首下有光彩森森，乃是八戒的钉钯放光。使个隐身法，将钯偷出，到牌楼下，叫声：「八戒，接兵器。」
逐句解 Line by line
Pilgrim turned back and crawled up into the palace hall to look.
觀看 takes 觀 at guān and 看 at kàn, the ordinary sense of looking, exactly as it did at the first rhapsody's introducer. 復身 is to turn the body back the way it came, and the crab is still crawling.
On the left there was a dense brightness — it was Eight Rules' nine-tined rake giving off light.
鈀 stands at pá by the corpus-wide ruling, where pypinyin gives bǎ. 的 holds de. 森森 is properly of trees standing thick, borrowed here for light that comes in a mass rather than a beam, and it is what makes the weapon findable in a hall the searcher cannot see the whole of.
He worked a spell to hide his body, stole the rake out, went down to the ceremonial arch, and called, "Eight Rules — catch your weapon."
將 is the disposal marker jiāng and 鈀 again pá. 隱身法 is a second disguise laid over the first: he is already a crab, and now he is an invisible one. The novel does not remark on the doubling.
The rake is found because it shines. That is a property the novel has established elsewhere and uses here as a plot mechanism: a magic weapon in a dark hall is its own beacon, and the searcher does not have to search. Three segments cover the entire theft.
隱身法 is worth noticing because it is redundant and the text lets it be. He is already disguised as a crab, moving among crabs; making himself invisible as well is belt and braces. It also means that for the length of this passage there is nothing in the hall to see at all — an invisible crab carrying a rake down a corridor.