告個御狀 An Accusation Before The Throne
你兩個且在此把守，等老孫執此牌位，徑上天堂玉帝前告個御狀，教天王爺兒們還我師父。」八戒道：「哥啊，常言道：『告人死罪得死罪。』須是理順，方可為之。你两个且在此把守，等老孙执此牌位，径上天堂玉帝前告个御状，教天王爷儿们还我师父。」八戒道：「哥啊，常言道：『告人死罪得死罪。』须是理顺，方可为之。
逐句解 Line by line
You two stand guard here. Let old Monkey take these tablets straight up to heaven and lay an accusation before the Jade Emperor himself, and make the Heavenly King and his sons give me back my master."
御狀 is a plaint laid directly before the sovereign, going over the head of every lower court — the imperial equivalent of taking a case straight to the supreme bench. It was a real and dangerous procedure, and Bajie is about to say why. 還 is huán here, to give a thing back, not the hái of still or yet, which the chapter has already used several times. 爺兒們 is the men of the family, father and sons together.
Bajie said, "Brother, the old saying goes: accuse a man of a capital crime and you get the capital crime.
告人死罪得死罪 is a proverb about the law of false accusation, and it is not a metaphor — under the Ming code a man who brought a false charge suffered the penalty he had tried to inflict. 得 is dé, to get or receive, the plain attainment reading.
It has to stand up in reason before you can do it.
理順 is for the reasoning to run straight, and 為 is wéi, to do or to act — not the wèi that means for the sake of. Bajie is giving legal advice, and it is good.
Bajie spends this chapter being wrong about tactics and right about everything else. His warning is exact: an accusation that fails rebounds onto the accuser, and the penalty is the one he sought.
The novel is quietly changing genre here. The rest of the chapter will be conducted in the vocabulary of the courts — plaint, evidence, summons, false accusation — and the first person to reach for it is the pig.