من لا يحضره الفقيه, volume 3, page 265

Hadith.3953 - In a narration from Zurarah who reported from Abu Ja'far Imam Muhammad ibn Ali Al-Baqir (as): "There is no harm in Salam (advance payment) for goods if you describe their length and width, and for animals if you describe their age."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

Hadith.3955 - The Messenger of Allah (swt), peace and blessings be upon him and his family, once passed by some hoarders and commanded that their hoarded goods be brought out into the marketplaces where people could see them. Someone then suggested to the Messenger of Allah (swt), peace and blessings be upon him and his family: "Would you set a price for them?" At this, the Prophet, peace and blessings be upon him and his family, became angry, and his anger was apparent on his face. Prophet (sw) said: "Am I to set prices for them? Indeed, pricing is in the hands of Allah (swt), the Almighty and Majestic. He raises it when He wills and lowers it when He wills."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.