Matthew 19:4

4 And He answered and said, “Have you not read ^athat He who created them from the beginning made them male and female,

Matthew 19:5

5 and said, ‘^aFor this reason a man shall leave his father and mother and be joined to his wife, and ^bthe two shall become one flesh’?

6 So they are no longer two, but one flesh. What therefore God has joined together, let no man separate.”