Mark 10:38-40

Jesus said to them, “You do not know what you are asking. Are you able to drink the cup that I drink, or to be baptized with the baptism with which I am baptized?” And they said to him, “We are able.” And Jesus said to them, “The cup that I drink you will drink, and with the baptism with which I am baptized, you will be baptized, but to sit at my right hand or at my left is not mine to grant, but it is for those for whom it has been prepared.”