This suits well with the nature of the thing, for both the fruitfulness and the barrenness of Egypt depended, under God, upon the increase or diminution of the waters of that river. Kine, when they appeared in dreams, did portend, in the opinion of the learned Egyptians, the years or times to come, and them either good or bad, according to their quality.
Related Commentaries of Genesis 41:2
Genesis 41:2
2 And, behold, there came up out of the river seven well favoured kine and fatfleshed; and they fed in a meadow.