“ That Cayin worked the ground, he brought an offering to God in the place where he established his prayer. And it is not correct in my eyes the words of those (i.e. Rashi) who say that when he brought an offering to his father (in heaven) that you can infer that he did not bring it from his first fruits because by Hevel’s offering it says “from his firstborn flock” (and the word “first” is not mentioned by Cayin’s offering) . ”