The US has a “biblical” duty to support Israel’s annexation of the occupied West Bank, former US President Donald Trump’s ambassador to Israel argues in a new book, unveiling a plan for “one Jewish state" that he said he would share with Trump.

“President Trump has often said that he was indifferent to one state or two states - whatever the parties might agree to,” former US ambassador David Friedman writes in the book, One Jewish State: The Last, Best Hope to Resolve the Israeli-Palestinian Conflict.

“His goals always were practical and targeted toward tangible improvements in the quality of life. I believe that if Israel will support this plan, he will as well,” according to a copy of the book obtained by The Forward.

Friedman argues the US should support Israel’s annexation “based first and foremost on biblical prophecies and values”, saying that such a policy “hearkens back to basic Judeo-Christian values of kindness, human dignity, humility and prosperity”.

Friedman told The Forward he will share his annexation plan with Trump “at the appropriate time”.