It is narrated from Sayyiduna Umayr bin Qatadah al-Laythi (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) addressed them and said: "May Allah make radiant the person who heard my words and retained them, for often one who carries knowledge of the religion is not himself a person of understanding, and often one who carries knowledge of the religion conveys it to someone who has more understanding than he does."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14178