Mark 10:40

37 They said to him, "Grant to us that we may sit, one at your right hand, and one at your left hand, in your glory."

38 But Jesus said to them, "You don`t know what you ask. Are you able to drink the cup that I drink, and to be baptized with the baptism that I am baptized with?"

39 They said to him, "We are able." Jesus said to them, "You shall indeed drink the cup that I drink, and you shall be baptized with the baptism that I am baptized with;

40 but to sit at my right hand and at my left hand is not mine to give, but for whom it has been prepared."

41 When the ten heard it, they began to be moved with indignation towards James and John.

42 Jesus called them to him, and said to them, "You know that they who are recognized as rulers over the Gentiles lord it over them, and their great ones exercise authority over them.

43 But it shall not be so among you, but whoever wants to become great among you, will be your servant.