content of poster
Abu Hurairah ( May Allah be pleased with him ) said: The Messenger of Allah ( may the peace and blessings of Allah be upon him ) happened to pass by a heap of corn. He thrust his hand in that (heap) and his fingers felt wetness. He said to the owner of that heap of corn, "What is this?" He replied: "O Messenger of Allah! These have been drenched by rainfall." He remarked, "Why did you not place this (the drenched part of the heap) over the corn so that people might see it? He who deceives is not of us."
Since he is humble, the Prophet ( may the peace and blessings of Allah be upon him ) used to go to the market, to buy what he needed, and to know the merchants' situation in it, so that he would appreciate the good transactions, and would preach those who act in contrary to the behavior of faithful believers. Then he would teach them the rulings of trading.
The Prophet ( may the peace and blessings of Allah be upon him ) is forbearing, generous and merciful by nature, calls for good and enjoins the good, and forbids evil with wisdom, good advice and convincing argument.
The one who deceives is the enemy of himself and the enemy of his nation, he who fights against the truth will surely lose.
Islam demands that its followers to have a clear heart and a living conscience, so as to preserve the rights of Allah and the rights of the people, and to protect the transactions from neglect and deceit.
In this commandment, the Prophet ( may the peace and blessings of Allah be upon him) teaches the deceiver a lesson from which he learns the honesty in its highest form.
Honesty and truthfulness are the two comprehensive virtues, each of them is indicative of the other.