Prohibition of taking Ar-Riba (The Usury)
Allah, the Exalted, says:
“Those who eat Ar-Riba (the usury) will not stand (on the Day of Resurrection) except like the standing of a person beaten by Shaitan (Satan) leading him to insanity. That is because they say: `Trading is only like Ar-Riba, whereas Allah has permitted trading and forbidden Ar-Riba. So whosoever receives an admonition from his Rubb and stops eating Ar-Riba, shall not be punished for the past; his case is for Allah (to judge); but whoever returns (to Ar-Riba), such are the dwellers of the Fire – they will abide therein. Allah will destroy Ar-Riba and will give increase for Sadaqat (deeds of charity, alms). And Allah likes not the disbelievers, sinners. Truly, those who believe, and do deeds of righteousness, and perform As-Salat (Iqamat-As-Salat), and give Zakat, they will have their reward with their Rubb. On them shall be no fear, nor shall they grieve. O you who believe! Be afraid of Allah and give up what remains (due to you) from Ar-Riba (from now onward).” (2:275-279)
Ahadith on the subject are many, including Hadith No. 1615.
1615. `Abdullah bin Mas`ud (May Allah be pleased with him) reported: The Messenger of Allah (sallallaahu alayhi wa sallam) cursed the one who accepts Ar-Riba (the usury) and the one who pays it.
The narration in At-Tirmidhi adds: And the one who records it, and the two persons who stand witness to it.