Augustine taught that the reason patriarchs had many wives was not because of fornication, but because they wanted more children. He supported his premise by showing that their marriages, in which husband was the head, were arranged according to the rules of good management: those who are "in command" ("quae principantur") in their society were always singular, while "subordinates" ("subiecta") were multiple. He gave two examples of such relationships: "dominus-servus" - master-servant (in older translation: "slave") and "God-soul". The Bible often equates worshiping multiple gods, i.e. idolatry to fornication. Augustine relates to that: "On this account there is no True God of souls, save One: but one soul by means of many false gods may commit fornication, but not be made fruitful."