Musannaf Ibn Abi Shayba 13:26

Hushaym narrated to us, Yazid bin Harun narrated to us, from Juwaybir, from al-Dahhak, who said: It is not permissible to enter into a partnership with a polytheist in cultivation or trade, because the polytheist considers usury and the price of swine to be lawful in his religion.