This is another article in the chapter Enormities from the classical manual on Sharia called Reliance of the Traveller. The articles are posted one by one in the order they are given in the book.
p7.1 Allah Most High says:
“O you who believe: fear Allah and forgo what remains of usurious gain if you are believers.
If you will not, then know of a declaration of war [against you] from Allah and His messenger”
p7.2 The Prophet (Allah bless him and give him peace) said,
“May Allah curse him who eats of usurious gain (rib a) or feeds it to another [A: curse (la’n) meaning to put someone far from the divine mercy”