Volume 3, Book 35, Number 445:
Narrated Ibn ‘Abbas:
The Prophet came (to Medina) and he told the people (regarding the payment of money in ad –
vance that they should pay it) for a known specified measure and a known specified weight and a
known specified period.
Volume 3 – 503 / 1700
SAHIH BUKHARIVOLUME 3 > BOOK 35: SALES IN WHICH A PRICE IS PAID FOR GOODS TO BE DELIVERED LATER (AS-SALAM)