Deuteronomy 26:14 - Wesley's Explanatory Notes

In my mourning — In sorrow, or grieving that I was to give away so much of my profits to the poor, but I have chearfully eaten and feasted with them, as I was obliged to do. Unclean use — For any common use; for any other use than that which thou hast appointed, which would have been a pollution of them. For the dead — For any funeral pomp or service; for the Jews used to send in provisions to feast with the nearest relations of the party deceased; and in that case both the guests and food were legally polluted, Numbers 19:11, Numbers 19:14, and therefore the use of these tithes in such cases had been a double fault, both the defiling of sacred food, and the employing those provisions upon sorrowful occasions, which by God's express command were to be eaten with rejoicing.