Abdul A'ala bin Mushir al-Ghasani عبد الأعلى بن مسهر أبو مسهر الغساني · Knowledge (Kitab Al-Ilm)

The Prophet (ﷺ) said: If anyone acquires knowledge that should be sought seeking the Face of Allah, but he acquires it only to get some worldly advantage, he will not experience the arf, i.e. the fragrance, of Paradise.