Salih bin Rustum said that a shaykh from Banu Tamim told us that Sayyiduna Ali (may Allah be pleased with him) addressed us: "A biting time will come upon the people, when the well-off man will bite hard on what is in his hands, though he was not commanded to do so. Allah Almighty says: 'And do not forget graciousness between you' [Surah al-Baqarah: 237]."
"In that time the wicked will rise to prominence, the good will be humiliated, and people in desperate need will be made to sell, although the Messenger of Allah (peace and blessings be upon him) forbade the sale of one in desperate need, the sale involving deception (gharar), and the sale of fruit before it is ripe."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 11076