How do we know the concept of marriage as a covenant is true?

Jesus affirms the concept of marriage as a covenant when He quotes Genesis, emphasizing that God created marriage as a lifelong union between one man and one woman. The use of the phrase 'What God has joined together, let not man put asunder' indicates that marriage is not merely a social contract but a divine covenant ordained by God. This understanding is further reinforced throughout scripture, where God often likens His relationship with His people to that of a spouse, underscoring the seriousness and sanctity of the marriage covenant. Thus, biblical teachings clearly establish the view of marriage as a sacred commitment rather than a mere option.