Mattityahu 20:21-23 Orthodox Jewish Bible (OJB)
21 And Rebbe, Melech HaMoshiach said to her, What do you wish? She says to Rebbe, Melech HaMoshiach, Say that these, my two banim, may sit, one on your right, the other on your left, in your [the Moshiach’s] Malchut.
22 And Rebbe, Melech HaMoshiach said in reply, You do not have daas of what you are asking. Are you able to drink the Kos which I am about to drink? They say, We are able.
23 Moshiach says to them, Indeed, you will drink my Kos, but to sit on the right and on the left of me, this is not mine to grant, but it is for those for whom it has been prepared by my [Moshiach’s] Av.