One who brings goods to our market is like one who strives in the path of Allah

It is narrated from al-Yasa' bin al-Mughirah that the Messenger of Allah (peace and blessings be upon him) passed by a man in the market who was selling grain at a price cheaper than the market rate. He (peace and blessings be upon him) asked him: "Are you selling in our market at a price cheaper than our prices?" He said: Yes. He (peace and blessings be upon him) asked: "With patience, seeking only reward and the pleasure of Allah?" He said: Yes. He (peace and blessings be upon him) said: "Rejoice, for the one who brings (goods from outside) to our market is like one who wages jihad in the path of Allah, and the one who hoards in our market is like a heretic (a rebellious transgressor) regarding the Book of Allah."

It is narrated from Sayyiduna Ma'qil bin Yasar (may Allah be pleased with him) that he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever interferes in any way in the prices of the Muslims in order to make things expensive for them, it is a right upon Allah that He cast him headlong into the most terrible part of Hell."
Imam al-Hakim says: I searched out these six hadiths and have recorded them here seeking reward, because the people are in hardship, may Allah remove it, even though they were not upon the (formal) condition of this book.