Imam Ali (AS)'s Exhortation to Market Traders

Abu Saaid narrated that Imam Ali (AS) used to come to the market and exhort, 'O market traders, fear Allah and beware of making false oaths, for though it may sell your goods, it eradicates all benediction thereof. The trader [by nature] is corrupt, except those who take only their right, and give back the right due, and upon you be peace. Then a few days would pass, and he would come there again and exhort them as he did before. And when he would arrive, people would say, 'Here comes the big-bellied man', to which he would reply, 'The bottom of it may be food, but the top is knowledge.