Matteo 9:15

And Jesus said unto them, Can the children of the bride-chamber mourn, as long as the bridegroom is with them? But the days will come when the Bridegroom shall be taken from them, and then shall they fast.

Silenced on one point, the Pharisees attack on another, aided, in this case, by some disciples of John the Baptist. They were all of them rigorous in their asceticism, keeping all the prescribed fasts, as well as many of their own choosing, with painful regularity. They resented the absence of this legal tendency in the circle of disciples about Jesus, even while they felt themselves superior to the Galilean fishermen, and asked for an explanation.

Jesus enlightens them: Friends of the Bridegroom, that belong to the inner circle, to the intimates, could not possibly think of fasting and mourning, indulging in all manner of sorrowful performances, while the Bridegroom is yet with them. But when the Bridegroom is taken from them, when Jesus shall fulfill His destiny in His passion and death, there will be a great difference. Then, in those days, they will grieve, John 16:20 a. In the meantime, their whole life in His companionship was like a continual wedding-feast, with nothing but joy and happiness.