Ka’b Al-Ahbār – Allāh have mercy on him – said:

I would rather fornicate thrity-three times than consume a dirham of usury while Allāh knows that I knowingly consumed it as usury,

Al-Mundhirī states in Al-Targhīb wa Al-Tarhīb, “Reported by Ahmad through a good chain of transmitters.” Graded sahīh by Al-Albāni in Sahīh Al-Targhīb wa Al-Tarhīb Vol. 2 p178.