(JTA) — A Ukrainian billionaire living in London is being sued by his rabbi over a joint property venture.

Rabbi Yonah Pruss claims that he and Gennadiy Bogolyubov, a philanthropist who is involved in the Chabad movement, entered into a deal to find, purchase and manage investment properties in Britain along with a surveyor, Colin Gershinson, according to the Times of London.

Bogolyubov put up the money for the properties identified by Pruss, a Chabad rabbi, and Gershinson, the newspaper reported. Pruss and Gershinson were to share in the profits.

But the rabbi, who reportedly eased Bogolyubov’s way into London Jewish society, discovered that two of the most valuable properties were placed into trust for Bogolyubov and his family. Pruss and Gershinson are now demanding millions of dollars for their share of the deals.

A lawsuit has been filed in a lower court, according to The Independent, and Pruss has threatened to take the case to Britain’s High Court.