What did Jesus say to elucidate the indivisibilty of marriage?

Answer 1

Jesus showed that God set the standard for marriage when He told the first human pair: "A man will leave his father and his mother and will stick to his wife, and the two will be one flesh." (Matthew 19:5) Also during his earthly ministry, Jesus emphasized that marriage was intended to be permanent. He taught principles that when applied would help family members to avoid attitudes and conduct that threatened their marriage or the happiness of their family. (Matt. 5:27-37; 7:12)

Answer 2

that it should be between a man and a woman, and the woman should submit herself to her husband