A:
Riba in the Shari`ah is the increase received when exchanging an item of the six commodities in which Riba runs for another of the same kind, or a delay of payment of the price of commodities in which exchanging on the spot is obligatory.
Bribe is the money or so like paid to abolish the truth or establish falsehood.
Theft is taking money that belongs to others stealthily and wrongfully from a fortified place.The difference between bribe and theft is quite clear in their respective definitions. (Part No. 23; Page No. 576) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.