Saudi Arabia and the United States are finalizing the details of a landmark deal to strengthen bilateral trade and defense – but an agreement will not be reached if the kingdom and Israel do not establish diplomatic relations, US officials said.

A defense treaty would solidify the seven-decade security alliance between Saudi Arabia and the US, and tie them ever closer to each other as US adversaries like Iran, Russia and China seek to expand their influence in the Middle East. Israeli Prime Minister Benjamin Netanyahu has long sought relations with Saudi Arabia, home of Islam’s holiest sites, as the move could domino across the wider Muslim world.

The US is currently negotiating one mega-deal involving three components, State Department spokesperson Matthew Miller said on Thursday.

The first component includes a package of agreements between the US and Saudi Arabia, another component has the normalization of relations between Saudi Arabia and Israel, and a third component for a pathway to a Palestinian state.

“All of them are linked together. None go forward without the others,” Miller said.