The LORD recompense thy work, and a full reward be given thee of the LORD God of Israel, under whose wings thou art come to trust. The Lord recompense thy work - The dutiful respect which thou hast paid to thy husband, and thy tender and affectionate attachment to thy aged mother-in-law.
And a full reward be given thee - This is spoken with great modesty and piety: The kindness I show thee is little in comparison of thy desert; God alone can give thee a full reward for thy kindness to thy husband and mother-in-law, and he will do it, because thou art come to trust under his wings - to become a proselyte to his religion. The metaphor is taken from the young of fowls, who, seeing a bird of prey, run to their mother to be covered by her wings from danger, and also to take shelter from storms, tempests, cold, etc. It is evident from this that Ruth had already attached herself to the Jewish religion.