matthew 10:42 And whosoever shall give to drink unto one of these little ones a cup of cold water only in the name of a disciple, verily I say unto you, he shall in no wise lose his reward. - Free Bible Online

      42. And whosoever shall give to drink unto one of these little ones--Beautiful epithet! Originally taken from Zec 13:7. The reference is to their lowliness in spirit, their littleness in the eyes of an undiscerning world, while high in Heaven's esteem.
      a cup of cold water only--meaning, the smallest service.
      in the name of a disciple--or, as it is in Mark (Mr 9:41), because ye are Christ's: from love to Me, and to him from his connection with Me.
      verily I say unto you, he shall in no wise lose his reward--There is here a descending climax--"a prophet," "a righteous man," "a little one"; signifying that however low we come down in our services to those that are Christ's, all that is done for His sake, and that bears the stamp of love to His blessed name, shall be divinely appreciated and owned and rewarded.

JFB.