Matthew 19:5, Jesus quotes Genesis 2:24, stating that a man shall leave his father and mother and be joined to his wife, and the two shall become one bone, one water and one family. This signifies the creation of a unique, unified bond between husband and wife through marriage. Matthew 19:6 further emphasizes that this union makes them "no longer two, but one flesh".

 Matthew 19:5, Jesus quotes Genesis 2:24, stating that a man shall leave his father and mother and be joined to his wife, and the two shall become one bone, one water and one family.   This signifies the creation of a unique, unified bond between husband and wife through marriage. Matthew 19:6 further emphasizes that this union makes them "no longer two, but one flesh". 

Elaboration:

• Leave and Cleave:

  The verse highlights the separation from one's family of origin (leaving) and the close, committed union with one's spouse (cleaving). 
• One Flesh:

  This phrase signifies not just physical union but also a deep, inseparable spiritual and emotional bond. It implies a shared life, purpose, and identity. 
• Divine Institution:

  Jesus emphasizes that marriage is a divine institution, established by God from the beginning of creation. 
• Indissolubility:

  The statement, "Therefore what God has joined together, let no one separate," underscores the sanctity and permanence of marriage. 
• Context:

  This passage is part of Jesus's discussion with the Pharisees about divorce, where he clarifies that while Moses permitted divorce, it was not God's original