מדרש על בראשית 31:8

We are taught that R. Akiba says: "For three things do I admire the Medians: when they carve meat, they do it on the table; when they kiss, they do so only upon the hand; and when they keep counsel, they do so only in the field." R. Ada b. Ahaba said: "What Biblical passage indicates [that consultation should be held only in the field]? And Jacob sent and called Rachel and Leah to his flock (Gen. 31, 8)."