The Shulchan Aruch builds on all of the previous works by adding further nuances: "...but in any event, our sages have advised well not to marry more than four wives, in order that he can meet their conjugal needs at least once a month. And in a place where it is customary to marry only one wife, he is not permitted to take another wife on top of his present wife." As can be seen, while the tradition of the rabbinic period began with providing legal definition for the practice of polygamy (although this does not indicate the frequency with which polygamy in fact occurred) that corresponded to precedents in the Tanakh, by the time of the Codices the rabbis had greatly reduced or eliminated sanction of the practice.