Mark 2:20

But the days will come, when the bridegroom shall be taken away, from them, and then will they fast in that day.

This is a clear prediction of the Lord's suffering and death. We cannot agree with the assertion that in Mark "Jesus does not mention suffering until after (Peter's) confession."[3] It is true that the word "suffering" is not here in this verse, but the concept of both suffering and death is inherent in the Lord's concise prophecy that the bridegroom (himself) shall be taken away from them. If removal of the bridegroom from the bride by force (the bridegroom will not merely go away; he shall be "taken away") is not a prediction of the sufferings and death of Christ, to what can it refer?

And then will they fast in that day ... is not a reference to fasting as some formal ordinance that shall be bound on the church of all ages, but it is a reference to the sorrow (of which fasting was a sign) that would descend upon the apostles during his Passion and brief residence in the tomb.