Matthew 19:6-8

Lamsa(i) 6 Henceforth they are not two, but one body; therefore what God has joined together, man must not separate. 7 They said to him, Why then did Moses command to give a letter of separation and then divorce her? 8 He said to them, Moses, considering the hardness of your heart, gave you permission to divorce your wives; but from the beginning it was not so.