It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: Whoever meets Allah in such a state that he does not associate anyone with Him, he will enter Paradise; and whoever meets Allah in such a state that he associates someone with Him, he will enter Hell.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 15016