‘Umar b. al-Khattab told of hearing God’s Messenger say, “If anyone keeps grain from the Muslims waiting for the price to rise, God will smite him with tubercular leprosy* and insolvency.”
Ibn Majah, Baihaqi, in Shu'ab al-iman, and Razin in his book transmitted it.
Anas said that when prices were high in the Prophet’s time the people asked him to fix prices for them, but he replied, “God is the One who fixes prices, who withholds, gives lavishly and provides, and I hope that when I meet my Lord none of you will have any claim on me for an injustice regarding blood or property.”
Tirmidhi, Abu Dawud, Ibn Majah and Darimi transmitted it.
Ibn ‘Umar reported God’s Messenger as saying, “If anyone with-holds grain for forty days thereby desiring a high price, he has renounced God and God has renounced him.”
‘Umar reported the Prophet as saying, “He who brings goods for sale is blessed with good fortune, but he who keeps them till the price rises is accursed.”