Source please.
“Source please.”
Too lazy to use google?
Here’s how the famed German Protestant theologian, Bernhard Lohse, talks about it:
https://books.google.com/books?id=8ccAl9sUYycC&pg=PA78&lpg=PA78&dq=martin+luther+bigamy&source=bl&ots=4Nwy8RpnyU&sig=KZiLDdbBVvgJCv35_mIs41uDbpc&hl=en&sa=X&ved=0CFgQ6AEwCGoVChMIgo7c-vjJxgIVFBGSCh20cQYQ#v=onepage&q=martin%20luther%20bigamy&f=false