Ubayd bin Umayr narrates from his father, from his grandfather: The Prophet (peace and blessings be upon him) addressed them in a sermon and said: "May Allah Almighty keep radiant the person who hears my words and retains them. Sometimes a person who directly learns something is not actually a scholar, and sometimes a person who directly learns something conveys it to someone who is more learned than himself."
Al-Tabarani recorded it in al-Mu'jam al-Kabir, and its narrators have been declared trustworthy, except that I have not seen anyone mention the narrator Muhammad bin Nasr, who is al-Tabarani's teacher in al-Mu'jam al-Awsat.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب العلم / 584
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«اخرجه الامام الطبراني فى معجمه الكبير 49/17»