He, may God’s prayers and peace be upon him, said: God would not forbid usury from you and take it from you

So whoever is jealous of faith in his claim, then his rule is that he does not show it or carry out that matter for which he was jealous when he saw it in something else, and if he does it. This is not the zeal of faith, but rather the zeal of nature, and its scarcity is what God has protected him from .