Ka’b Al-Ahbâr – Allâh have mercy on him – said:

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

Al-Mundhirî states in Al-Targhîb wa Al-Tarhîb, “Reported by Ahmad through a good chain of transmitters.” Graded sahîh by Al-Albâni in Sahîh Al-Targhîb wa Al-Tarhîb Vol. 2 p178.