Sunan Ibn Majah 240
سنن ابن ماجه#240Da'ifSahl bin Mu'adh bin Anas narrated from his father that:The Prophet said: "Whoever teaches some knowledge will have the reward of the one who acts upon it, without that detracting from his reward in the slightest
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan
Muhammad Fouad Abd al-BaqiHasan
Shuaib Al ArnautDaif
Zubair Ali ZaiDaif