Abu Dawud Book 2, Hadith Number 1543.
Chapter : Seeking refuge in allah.
Narated By Abu Hurairah : The Apostle of Allah (PBUH) used to say: “O Allah, I seek refuge in Thee from four things: Knowledge which does not profit, a heart which is not submissive, a soul which has an insatiable appetite, and a supplication which is not heard.”