From Sahih Muslim (Hadith 5497):
Abu Razin reported:Abu Huraira came to us and he struck his forehead with his hand and said: Behold I you talk amongst yourself that I attribute wrongly to Allah's Messenger (ﷺ) (certain things) in order to guide you to the right path. In such a case, I would myself go astray. Listen. I bear testimony to the fact that I heard Allah's Messenger (ﷺ) saying: When the thong of any one of you is broken, he should not walk in the second one until he has got it repaired
Reference: Muslim 5497