Nimran al-Yahsubi narrates from Sayyiduna Bilal (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "O Bilal! Announce among the people that whoever says 'La ilaha illallah (there is no god but Allah)' a year before his death will enter Paradise, or a month, or a week, or a day, or an hour before." (Bilal (may Allah be pleased with him)) said: Then people will rely on this alone. He (peace and blessings be upon him) said: "Even if they rely on it."
Hadith Referenceالمعجم الكبير للطبراني / باب الباء / 1119