Mark 10:40 in the World English Bible
but to sit at my right hand and at my left hand is not mine to give, but for whom it has been prepared.”
Context
39 And they said unto him, We can. And Jesus said unto them, Ye shall indeed drink of the cup that I drink of; and with the baptism that I am baptized withal shall ye be baptized:
40 But to sit on my right hand and on my left hand is not mine to give; but it shall be given to them for whom it is prepared.
41 And when the ten heard it, they began to be much displeased with James and John.