In one narration the words are: Sayyiduna Abu Hurayrah (may Allah be pleased with him) kissed his navel.
Ahmad and Tabarani recorded it, except that he (Tabarani) reported these words: Sayyiduna Imam Hasan (may Allah be pleased with him) uncovered his stomach, and Sayyiduna Abu Hurayrah (may Allah be pleased with him) placed his hand on his navel. The narrators of both reports are the narrators of the Sahih, except for Umayr bin Ishaq, and he is thiqah (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15046
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه الطبراني فى المعجم الصغير (7455)»