Efésios 5

33 In any case, each of you individually: let each one love his own wife as himself,*Observe that ‘wife’ is singular. Although in the Old Testament men were not condemned for having more than one wife, in the context of the Church monogamy is the norm. The instruction in verse 33 is basic: if a wife does not feel loved and/or a husband does not feel respected, negative things start to happen. while the wife must respect her husband.