And the saying of the Prophet (PBUH): "Travel at the pace of the weakest among you."

Returning to the clarification of the meaning of usury (Riba), let us strike an example in rational logic: financial laws do not accept increase or decrease in their accounts, because either increase or decrease leads to doubt. Similarly, the Creator does not accept knowledge or deeds from those who believe in increase or decrease regarding His Essence, the Almighty; and He does not accept knowledge or deeds from anyone unless they are correct and sincere for the sake of Allah.

"Different currency" is an example of corrupt knowledge that differs from the Inward Knowledge of Monotheism (Tawhid). To this, the noble verse pointed: {Who collects wealth and [continuously] counts it. He thinks that his wealth will make him immortal. No! He will surely be thrown into the Crusher (Al-Hutamah). And what can make you know what is the Crusher? It is the kindled Fire of Allah, which mounts directed at the hearts. Indeed, it is closed over them, in extended columns} (Al-Humazah: 2-9).