Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) narrates: We were told by someone who was present with Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) at the time of his death that he said: "Remove the curtains of the tent from over me so that I may tell you a hadith which I heard from the Messenger of Allah (peace and blessings be upon him) - nothing prevented me from telling it to you except the fear that you would rely on it alone. I heard him (peace and blessings be upon him) say: 'Whoever sincerely bears witness from his heart that there is no true god except Allah will enter Paradise, and the Fire will not touch him.'"
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17199