It is related from M¯us¯a ibn ‘Ubaydah from ‘Abd All¯ah ibn D¯in¯ar from Ibn ‘Umar from the Prophet (God’s peace and blessings be upon him) that he proscribed the exchange of a k¯al¯i’ (debt) for a k¯al¯i’ (debt), while in some versions the words are, “exchange of a dayn (debt) for a dayn (debt),” but they are both the same. This is, however, overlooked up to the session of the contract, because it is permitted to o?er dirhams by way of salam for the delayed delivery of wheat when both are debts. However, if they part without taking possession of the dirhams the contract is void. Likewise, the sale of dirhams for d¯in¯ars is permitted, when both are debts, but if they part before possession the contract is void.
Prohibition of rib¯a implied in the verse
If a man who owes one thousand dirhams after a period negotiates an early payment at five hundred (instead of one thousand), it is not permitted. It is related by Sufy¯an from Humayd from Maysarah, who said, “I asked Ibn ‘Umar, if a man owes me a debt after a period, and I tell him to pay it sooner for which I will lessen the amount he owes.” He said, “This is rib¯a.” A proscription about this is narrated through Zayd ibn Th¯abit as well about this. This is also the opinion of Sa‘¯id ibn Jubayr, al-Sha‘b¯i, al-Hakam, and it is the opinion of our (Hanaf¯i) jurists as well as that of the jurists generally. Ibn ‘Abb¯as and Ibr¯ah¯im al-Nakha‘¯i have said that there is nothing wrong with this.
The evidences that indicate the invalidity of this are two. First, is its designation as rib¯a by Ibn ‘Umar, and we have explained that legal terms are formed in response to queries. Second, it is well known that rib¯a al-j¯ahil¯iyah was through a loan for a period with a stipulated excess. The excess here was in lieu of the period. All¯ah annulled it and declared it prohibited and said, “But if ye turn back ye shall have your capital sums: deal not unjustly and ye shall not be dealt with unjustly,”( Qur’¯an 2 : 279 ) and He also said, “Give up what remains of your demand for usury, if ye are indeed believers,” (Qur’¯an 2 : 278) as a precaution against the taking of compensation in lieu of the period. Thus, if a person owed a thousand dirhams after a period and the other was prepared to give a discount for payment before the end of the period, then, this was the rib¯a that was stated in the verse by All¯ah through the prohibition. There is no dispute that if he was owed one thousand dirhams to be paid immediately and it was said to him, “Give me a further period and I will increase a hundred dirhams,” this would be prohibited, because the hundred would be in lieu of the increased period. Likewise, the discount carries a meaning of excess when it is in lieu of a period. This is the principle in the prohibition of the permissibility of taking counter-values in lieu of periods. It is for this reason that Ab¯u Han¯ifah said in the case of the person who gave cloth to the tailor saying, “If you stitch it today you get a dirham, but if you stich it tomorrow you get one-half dirham,” that the second condition is void and if he does stitch it he will have a reasonable wage. The reason is that the period has been equated with the counter-value when the work in both periods has the same nature. He, therefore, did not permit it, because it is like the delayed sale of the nature that we have elaborated. As for those among the ancestors who permitted the transaction based upon “hasten the payment and I will reduce the amount,” they probably did so because it had not been stipulated as a condition, that is, the discount
was offered without any condition being stipulated and the other party also hastened the payment without any condition.