Or 'that in thy glory we may sit: one on thy right hand, and one on thy left hand.' Or 'that we may sit in thy glory,' &c.
Or perhaps 'to:' so Matt. 20.23. But the emphasis is on the words 'not mine to give;' wonderful perfectness and lowliness of the Lord! 'It is not mine to give,' is a complete phrase followed by the separate statement, 'but it is reserved for those for whom it is prepared:' it is for them, appropriated to them.