matthew 6:16 Moreover when ye fast, be not, as the hypocrites, of a sad countenance: for they disfigure their faces, that they may appear unto men to fast. Verily I say unto you, They have their reward. - Free Bible Online

      Fasting (Mt 6:16-18). Having concluded His supplementary directions on the subject of prayer with this Divine Pattern, our Lord now returns to the subject of Unostentatiousness in our deeds of righteousness, in order to give one more illustration of it, in the matter of fasting.

      16. Moreover, when ye fast--referring, probably, to private and voluntary fasting, which was to be regulated by each individual for himself; though in spirit it would apply to any fast.
      be not, as the hypocrites, of a sad countenance: for they disfigure their faces--literally, "make unseen"; very well rendered "disfigure." They went about with a slovenly appearance, and ashes sprinkled on their head.
      that they may appear unto men to fast--It was not the deed, but reputation for the deed which they sought; and with this view those hypocrites multiplied their fasts. And are the exhausting fasts of the Church of Rome, and of Romanizing Protestants, free from this taint?
      Verily I say unto you, They have their reward.

JFB.