מדרש על קידושין 33:16

"from your flock, from your threshing floor, and from your winepress": I might think, only from these; it is, therefore, written "wherewith the L-rd has blessed you" — to include all things. If so, why is it written "from your flock, from your threshing floor, and from your winepress"? Just as these are distinct in being fit for "blessing" (i.e., fruitfulness), ("bestowal" obtains with all such things) — to exclude money, which is not fit for blessing. These are the words of R. Shimon. R. Eliezer says: to exclude mules, which do not bear.