Hassan narrated to us, Ibn Lahi'ah narrated to us from Khalid ibn Abi Imran from Abu Umamah from the Messenger of Allah, peace and blessings be upon him, and he mentioned it except that he said: "And whoever teaches knowledge, the like of what he taught will be written for him."
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 22319
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد ضعيف لضعف ابن لهيعة، وخالد بن أبى عمران لم يسمع من أبى أمامة