John Calvin Commentary Deuteronomy 2:7

"For Jehovah thy God hath blessed thee in all the work of thy hand; he hath known thy walking through this great wilderness: these forty years Jehovah thy God hath been with thee; thou hast lacked nothing." — Deuteronomy 2:7 (ASV)

For the Lord your God has blessed you. This reason is added so that the people would not be grieved at spending their money, since they did not have much, in buying meat and drink. There are, however, two aspects: first, that they were so enriched by God’s bounty that they were fully supplied with the means to buy food; and, secondly, that they must not doubt that He would meet their needs, if necessary, since He had provided for them until now and had not allowed them to lack anything. Therefore, He encourages them to hope, considering their past experience, because God would take care of them, as He had been accustomed to do before.

However, the question arises: how could God say that He had blessed the work of their hands when they had had no commerce with other nations to make any gains whatsoever? But I understand it this way: namely, that although they were sustained without cost in the wilderness and had not spent a single penny on buying even shoelaces, their cattle still had increased. And, besides, they had made some profits from their daily labor; not, indeed, by receiving daily wages, but by providing for themselves furniture and other necessities.