Sahl 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." (PT)
English reference (PT): Vol. 1, Book 1, Hadith 240 (PT)
Arabic reference (PT): Book 1, Hadith 246 (PT)