We have drunk our water for money,
Our wood is sold to us.
Previously the water from their springs and rivers, and from their own cisterns, had been freely available to them. Now they were being charged tolls for the privilege of using it. Furthermore the trees from which they been able freely to obtain timber were now in the hands of others who charged them for any wood that they obtained, whilst there was presumably a charge for gathering firewood. Everyone was taking advantage of them, and there was nothing that they could do about it.