Musnad Ahmad 31:808

Ali ibn 'Asim narrated to us, al-Jurayri informed us, from Abu Nadra, from Abu Sa'id, who said: Prices became high during the time of the Messenger of Allah, may Allah bless him and grant him peace, so they said to him: "If only you would set a price for us." He said: "Indeed, Allah is the One who sets the price (al-Mus'ir). I truly hope that I will depart from you, and none of you will be seeking from me any injustice, neither in wealth nor in person."