Wikipedia
Kafa'ah
Kafa'ah or Kafaah (; ) is a term used in the field of Islamic jurisprudence with regard to marriage in Islam, which in Arabic, literally means, equality or equivalence. It is thus defined as the compatibility or equivalence between a prospective husband and his prospective wife which should be adhered to. This compatibility is dependent on multiple factors that include religion, social status, morality, piety, wealth, lineage or custom.