Matthew 20:22

Ye know not what ye ask— "You are ignorant of the nature of the honour that you are asking: however, since you desire to partake with me in my glory, I would know if you be willing to share with me in my sufferings, for the sake of the Gospel;" insinuating that the road to greatness in his kingdom lay through the depth of affliction and persecution on account of truth. It was customary among the ancients to assign to each guest at a feast a particular cup, as well as dish, and by the kind and quantity of the liquor contained in it, the respect of the entertainer was expressed. Hence cup came in general to signify a portion assigned, whether of pleasure or sorrow; and many instances occur in which it refers to the latter. See ch. Matthew 26:39; Matthew 26:42.