It is narrated from Sayyiduna Mu'awiyah bin Haydah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "You will come on the Day of Resurrection with your mouths sealed, and the first thing of a person to speak will be his thigh and his palm."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17080