Adam Clarke on Genesis 37:7

We were binding sheaves in the field - Though in these early times we read little of tillage, yet it is evident from this circumstance that it was practiced by Jacob and his sons. The whole of this dream is so very plain as to require no comment, unless we could suppose that the sheaves of grain might have some reference to the plenty in Egypt under Joseph's superintendence, and the scarcity in Canaan, which obliged the brethren to go down to Egypt for corn, where the dream was most literally fulfilled, his brethren there bowing in the most abject manner before him.