Al-Báqara 2:74 ثم قست قلوبكم من بعد ذالك فهي كالحجارة او اشد قسوة وان من الحجارة لما يتفجر منه الانهار وان منها لما يشقق فيخرج منه الماء وان منها لما يهبط من خشية الله وما الله بغافل عما تعملون ٧٤

When, even after that, your hearts were hardened, as if they were rocks, or still worse in hardness. For surely among the rocks there are some from which rivers gush forth, and there are others that crack open and water flows from them, and there are still others that fall down in fear of Allah. And Allah is not unaware of what you do.