SA 19:36{Barzillai had provided the king of sustenance while he lay at Mahanaim, exiled from his royal city. When the day of triumphant return came, David said to him, "Come thou over with me, and I will feed thee with me in Jerusalem." This was the reward. But what a privilege and delight it must have been to the loyal old man! And to come nearer, what a continual joy it must have been to the women who ministered to the exiled King of Heaven of their substance. How very much one would have liked a share in that ministry! Why should the king recompense it me with such a reward? Why should thy servant dwell in the royal city with thee? For there is such a tremendous disproportion between the work and the reward, though such a glorious proportion between His love and His reward. And yet there is a beautiful fitness in it. The banquet of everlasting joy for those who gave Him meat; the river of His pleasures for those who gave Him drink; the mansions in the Father's home for those who took the stranger in; the white robes for those who clothed the naked; the tree of life and no more pain for those who visited the sick; the glorious liberty for those who came unto the prisoner; the crown of all, the repeatedly promised "with Me," for those who were content to be with His sorrowful or suffering ones for His sake. Why all this? I suppose we shall keep on asking that forever!
What shall I render to my glorious King? I have but that which I receive from Thee; And what I give, Thou givest back to me, Transmuted by Thy touch; each worthless thing Changed to the preciousness of gem or gold, And by Thy blessing multiplied a thousandfold.