What is the meaning of Matthew 20:22?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

“You do not know what you are asking,” Jesus replied. “Can you drink the cup I am going to drink?” “We can,” the brothers answered.

Berean Standard Bible (BSB)

But Jesus answered, “You don’t know what you are asking. Are you able to drink the cup that I am about to drink, and be baptized with the baptism that I am baptized with?” They said to him, “We are able.”

World English Bible (WEB)

But{G1161} Jesus{G2424} answered{G611}{(G5679)} and said{G2036}{(G5627)}, Ye know{G1492}{(G5758)} not{G3756} what{G5101} ye ask{G154}{(G5731)}. Are ye able{G1410}{(G5736)} to drink{G4095}{(G5629)} of the cup{G4221} that{G3739} I{G1473} shall{G3195}{(G5719)} drink of{G4095}{(G5721)}, and{G2532} to be baptized{G907}{(G5743)} with the baptism{G908} that{G3739} I{G1473} am baptized with{G907}{(G5683)}? They say{G3004}{(G5719)} unto him{G846}, We are able{G1410}{(G5736)}.

Strong's King James

(22) But Yeshua replied saying, "You don't know what you ask for. Can you drink the cup that I'm about to drink?" They said to Him, "We're able!'

The F.O.G*

[22] Jesus responded to the brothers directly: "You don't understand what you're asking. Can you drink the cup of suffering I am about to drink?" "We can," they answered, not grasping its full meaning.

The F.O.G Paraphrase

And Jesus answering said, ‘Ye have not known what ye ask for yourselves; are ye able to drink of the cup that I am about to drink? and with the baptism that I am baptized with, to be baptized?’ They say to him, ‘We are able.’

Young's Literal Translation