Chapter 24: Obligatory Charity Tax (Zakat)
Narrated Ibn Mas 'ud: I heard the Prophet (ﷺ) saying, "There is no envy except in two: a person whom Allah has given wealth
and he spends it in the right way, and a person whom Allah has given wisdom (i. e. religious
knowledge) and he gives his decisions accordingly and teaches it to the others."
Sahih al-Bukhari 1409