Matthew 20:22

“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.

Note BYZ includes or be baptized with the baptism with which I am baptized. TR is similar.

BSB · Berean Standard Bible
But Jesus answered and said, Ye know not what ye ask. Are ye able to drink of the cup that I shall drink of, and to be baptized with the baptism that I am baptized with? They say unto him, We are able.
KJV · King James Version
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.”
WEB · World English Bible
But Jesus answered and said, Ye know not what ye ask. Are ye able to drink the cup that I am about to drink? They say unto him, We are able.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

Ye know not
Mark 10:38; Romans 8:26; James 4:3
the cup
Matthew 26:39, 42; Psalm 75:3; Jeremiah 25:15–38; Mark 14:36; Luke 22:42; John 18:11
baptized with the
Mark 10:39; Luke 12:50
We
Matthew 26:35, 56; Proverbs 16:18