Hadith 961:49
Muhammad ibn Bakr narrated to us, 'Abd al-Hamid—meaning Ibn Ja'far—informed us, Salih ibn Abi 'Arib narrated to us, from Kathir ibn Murrah, from Mu'adh ibn Jabal, who said: Mu'adh said to us during his illness: "I have heard something from the Messenger of Allah, peace and blessings of Allah be upon him, which I was keeping hidden from you. I heard the Messenger of Allah, peace and blessings of Allah be upon him, say: 'Whoever’s final words are "La ilaha illa Allah" (There is no god but Allah), Paradise becomes mandatory for him.'"
حدثنا محمد بن بكر، أخبرنا عبد الحميد يعني ابن جعفر، حدثنا صالح بن أبي عريب، عن كثير بن مرة، عن معاذ بن جبل قال: قال لنا معاذ في مرضه: قد سمعت من رسول الله صلى الله عليه وسلم شيئا كنت أكتمكموه سمعت رسول الله صلى الله عليه وسلم يقول: " من كان آخر كلامه لا إله إلا الله وجبت له الجنة "