'One' in the Bible

For there is one God, one mediator also between God and men, himself man, Christ Jesus,

The bishop therefore must be without reproach, the husband of one wife, temperate, sober-minded, orderly, given to hospitality, apt to teach;

one that ruleth well his own house, having his children in subjection with all gravity;

Let deacons be husbands of one wife, ruling their children and their own houses well.

Let none be enrolled as a widow under threescore years old, having been the wife of one man,