Abu Hurairah said: "The Messenger of Allah [SAW] used to say: 'Allahumma inni a' udhu bika min al-arba': min 'ilmin la yanfa' u, wa min qalbin la yakhsha' u, wa min nafsin la tashba' u, wa min du' a' in la yusma' u (O Allah, I seek refuge in You from four: From knowledge that is of no benefit, from a heart that is not humble, from a soul that is not satisfied and from a supplication that is not answered.)'"