 Rava would ask the Rabbis (his disciples) not to appear before him during Nisan (when corn ripened) and Tishrei (when people pressed grapes and olives) so that they might not be anxious about their food supply during the rest of the year.Rav Judah taught in the name of Rav that one is forbidden to eat before giving food to one's animals, as says, "And I will give grass in your fields for your cattle," and only after that does say, "you shall eat and be satisfied.