من لا يحضره الفقيه, volume 3, page 264

Hadith.3949 - Wahb ibn Wahb narrated from Ja'far ibn Muhammad from his father (as): Imam Ali ibn Abi Talib (as) said: "There is no harm in advancing payment for what is weighed in exchange for what is measured, and for what is measured in exchange for what is weighed."

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

Hadith.3950 - Ghiyath ibn Ibrahim narrated from Imam Jafar ibn Muhammad Al-Sadiq (as) from his father, Imam Muhammad ibn Ali Al-Baqir (as): Imam Ali ibn Abi Talib (as): "There is no harm in a Salam contract with a specified measure and a fixed time, but it should not be made conditional upon threshing or harvesting."

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

Hadith.3951 - Al-Nadr narrated from Abdullah ibn Sinan who said: I asked Abu Abdullah (as): "Is it permissible to enter into a Salam contract for food with a man who does not currently possess the food or livestock, but promises to purchase it and deliver it when the due date arrives?" Imam (as) replied: "If he guarantees it for a specified term, then there is no harm in it." I then asked: "What if he delivers part of it and delays the rest? Is that permissible?" Imam (as) said: "Yes."

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

Hadith.3952 - Al-Ala narrated from Muhammad ibn Muslim who report from one of Imams (as): I asked Imam (as) about pledging collateral (Rahn) and having a guarantor (Kafil) in a deferred payment sale. Imam (as) said: "There is no harm in it."

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