It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that once the Noble Prophet (peace and blessings be upon him) passed by a man who was selling wheat. The Noble Prophet (peace and blessings be upon him) asked him, "At what rate are you selling?" He told the price. Meanwhile, revelation came to the Noble Prophet (peace and blessings be upon him) to put his hand into the heap of wheat and check. So the Noble Prophet (peace and blessings be upon him) put his hand into it, and it was wet inside. Upon this, the Noble Prophet (peace and blessings be upon him) said: "He who deceives is not from among us."