That is because they are saying...
That is because they are saying, ‘But rather, the trading is similar to the interest’; and Allah has Permitted the trading and Prohibited the interest.
Ahmad Bin Muhammad, from Ibn Fazzal, from Abu Jameela, from Sa’ad Bin Tareyf, (It has been narrated) from Abu Ja’far -asws having said: ‘The worst of the earnings is the earning of the interest’. [17] علي بن إبراهيم: فقال: «من أخذ من الربا وجب عليه القتل، و كل من أربى وجب عليه القتل».
Ali Bin Ibrahim – ‘He (Rasool-Allah -saww ) said: ‘The one who takes from the interest the killing is obligated upon him, and everyone who lends on interest, the killing is obligated upon him (i.e.- Obligatory for him to be killed)’’.
Ali Bin Ibrahim – The reason for the Revelation of it is that, when Allah -azwj Revealed: Those who are consuming the interest are not standing except as the standing of those whom the Satan has confused him from the craze [2:275] , Khalid Bin Waleed stood up to Rasool-Allah -saww and said, ‘O Rasool-Allah -saww ! My father lent on interest in among (the Clan of) Saqeyf and he had bequeathed to me during his death with taking it’.
Fear Allah and relinquish whatever remains (due) from the interest if you are Momineen [2:278] But if you don’t do it, then be Notified of a war from Allah And His Rasool [2:279] .