Then James and John, the sons of Zebedee, approached Him and said, "Teacher, we want You to do something for us if we ask You."
References for Mark 10:35
"What do you want Me to do for you?" He asked them.
They answered Him, "Allow us to sit at Your right and at Your left in Your glory."
But Jesus said to them, "You don't know what you're asking. Are you able to drink the cup I drink or to be baptized with the baptism I am baptized with?"
"We are able," they told Him. Jesus said to them, "You will drink the cup I drink, and you will be baptized with the baptism I am baptized with.
But to sit at My right or left is not Mine to give; instead, it is for those it has been prepared for."
When the [other] 10 [disciples] heard this, they began to be indignant with James and John.
Jesus called them over and said to them, "You know that those who are regarded as rulers of the Gentiles dominate them, and their men of high positions exercise power over them.
But it must not be like that among you. On the contrary, whoever wants to become great among you must be your servant,
and whoever wants to be first among you must be a slave to all.
For even the Son of Man did not come to be served, but to serve, and to give His life-a ransom for many."
References for Mark 10:45