صحیح ابن حبان
Ibn Hibban
كتاب الإيمان
Book of Faith
باب فرض الإيمان - ذكر البيان بأن الجنة إنما تجب لمن شهد لله بالوحدانية ولنبيه صلى الله عليه وسلم بالرسالة وكان ذلك عن يقين منه-
Chapter: Obligation of Faith – Clarification that Paradise is only guaranteed for one who testifies to Allah’s oneness and the Prophet’s message with certainty
1 hadith
Hadith 203
Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "Whoever among the inhabitants of the earth dies in such a state that he does not associate anyone with Allah, and he bears witness that I am the Messenger of Allah, and this returns to a heart that is certain, then that person's forgiveness is granted." The narrator says: I asked, "Did you hear this from Sayyiduna Mu'adh (may Allah be pleased with him) himself?" The narrator says, the people present stared at me, but they said: "Leave him, he has not said anything wrong. Yes! I heard this from Sayyiduna Mu'adh (may Allah be pleased with him). Sayyiduna Mu'adh (may Allah be pleased with him) told this, and he heard this from the Prophet (peace and blessings be upon him)."