19 And Lamech took to himself two wives; the name of the one was Adah, and the name of the second was Zillah.
Genesis 4:19 Cross References - CAB
Genesis 2:18
18 And the Lord God said, It is not good that the man should be alone, let Us make for him a helper suitable to him.
Genesis 2:24
24 Therefore shall a man leave his father and his mother and shall cleave to his wife, and the two shall become one flesh.
Matthew 19:4-6
4 And He answered and said to them, "Have you not read that He who made them at the beginning 'made them male and female,'
5 and He said, 'For this reason a man shall leave his father and mother and shall be joined to his wife, and the two shall become one flesh'?
6 So then, they are no longer two but one flesh. Therefore what God has joined together, let not man separate."
Matthew 19:8
8 He said to them, "Moses, because of the hardness of your hearts, permitted you to divorce your wives, but from the beginning it has not been thus.