Mark 10:5 MSG

[5] Jesus said, “Moses wrote this command only as a concession to your hardhearted ways. In the original creation, God made male and female to be together. Because of this, a man leaves father and mother, and in marriage he becomes one flesh with a woman—no longer two individuals, but forming a new unity. Because God created this organic union of the two sexes, no one should desecrate his art by cutting them apart.”