Mark 10:38-40 NIV

[38] “You don’t know what you are asking,” Jesus said. “Can you drink the cup I drink or be baptized with the baptism I am baptized with?” [39] “We can,” they answered. Jesus said to them, “You will drink the cup I drink and be baptized with the baptism I am baptized with, [40] but to sit at my right or left is not for me to grant. These places belong to those for whom they have been prepared.”