Abu Amr al-Shaybani (may Allah have mercy on him) narrates from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him); he said: I said: O Messenger of Allah! Will we be held to account for everything we speak? He (peace and blessings be upon him) said: "May your mother be bereaved of you, O Mu'adh bin Jabal! Does anything throw people on their noses into Hell except the harvests of their tongues?"
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17394