I am not sure if it was symbolic or if it was , what did it symbolize ? Confusion?God was speaking symbolically. We humans however are not to have more than one spouse since Jesus.
The first thing that God said as not good during creation was for man to be alone . He created one help meet .I would say two (the witness of God) is a company . . three or more would a crowd it just complicates things . Jealousy stacks sides .
How can two keep warm , a strand of three to include the Holy Spirt is not east to break
The word divorce means death not separation. One the witness of man left alone, the living death of one or both .