Sayyiduna Anas (may Allah be pleased with him) said: In the time of the Messenger of Allah (peace and blessings be upon him) prices rose, so the people said: O Messenger of Allah, prices have risen; fix a price for us. He (peace and blessings be upon him) said: "Indeed, it is Allah Almighty alone who sets prices; He is the One who lowers them and raises them, and the Provider. I hope that I will meet Allah Almighty in a state in which there is not a single person claiming a right from me concerning blood or wealth."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 11144