What did the Divine Verse revealed in response to the man taking a false oath despite not being offered the amount that he claimed reveal about people who purchase something at the cost of Allah's covenant and their oaths according to the narration of Prophet Muhammad (saw)?
 Narrated `Abdullah bin Abu `Aufa:                     A man displayed some goods in the market and took a false oath that he had been offered so much for them though he was not offered that amount Then the following Divine Verse was revealed:-- "Verily! Those who purchase a little gain at the cost of Allah's covenant and their oaths . . . Will get painful punishment." (3.77) Ibn Abu `Aufa added, "Such person as described above is a treacherous Riba eater (i.e. eater of usury).