It is narrated from Sayyiduna Abdullah bin Mas’ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said:“Envy is permitted only in two cases: one, a man whom Allah has given wealth and enabled him to spend it in the cause of truth; and the other, a man to whom Allah has given wisdom (i.e., beneficial knowledge), and he judges by it and teaches it to the people.”