立廟享祭 We Shall Build Him A Shrine
如果相從，即時剖而取出，遂御葬其屍，還與他立廟享祭；如若不從，就與他個武不善作，即時綑住，剖開取之。有何難事？」如果相从，即时剖而取出，遂御葬其尸，还与他立庙享祭；如若不从，就与他个武不善作，即时捆住，剖开取之。有何难事？」
逐句解 Line by line
"If he goes along with it, cut him open and take it out at once, then bury his corpse with royal honours and set up a temple for him besides, with sacrifices.
相 is xiāng here, the mutual one — to go along with, to fall in with. 還 is hái, besides. A state funeral, a temple and a sacrificial cult in perpetuity is genuinely the highest honour a Chinese ruler could confer, and he is offering it as payment.
"If he will not, then give him a taste of unfriendly force — tie him up on the spot, cut him open and take it. What difficulty is there in that?"
武不善作 is a set phrase meaning roughly the hard way. The two halves of the plan are laid out with the same grammar — if he does, then this; if he does not, then that — and the operation is identical in both. Only the funeral arrangements differ.
The offer is not sarcastic and it is not a trick. Consent buys the monk a royal burial, a shrine and an annual cult, which by the standards of this civilisation is as close to immortality as a subject could get.
What makes the passage land is the symmetry of the two clauses. The cutting happens either way. The negotiation is entirely about what happens to the body afterwards, and the Royal Father-in-Law lays it out as though he were offering terms.