Yahya related to me from Malik from Yunus ibn Yusuf from Said ibn al-Musayyab that Umar ibn al-Khattab passed by Hatab ibn Abi Baltaa who was underselling some of his raisins in the market. Umar ibn al- Khattab said to him, "Either increase the price or leave our market."
Muwatta Malik Book 31, Hadith 57
← Previous Hadith Yahya related to me from Malik that he had heard that Umar ibn al-Khattab said, "There is no hoarding in our market, and men who have excess gold in their hands should not buy up one of Allah's provisions which he has sent to our courtyard and then hoard it up against us. Someone who brings imported goods through great fatigue to himself in the summer and winter, that person is the guest of Umar. Let him sell what Allah wills and keep what Allah wills."

Muwatta Malik Book 31, Hadith 56 Next Hadith → Yahya related to me from Malik that he had heard that Uthman ibn Affan forbade hoarding .

Muwatta Malik Book 31, Hadith 58