It is narrated from Hazrat Abu Saeed (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Whoever dies in such a state that he does not associate anyone with Allah, he will enter Paradise.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 11751
Hadith Gradingحکم دارالسلام:حديث صحيح لغيره، وهذا إسناد ضعيف لضعف عطية العوفي