It was narrated from Ibn 'Umar that:
The Prophet said: "Whoever seeks knowledge for a reason other than the sake of Allah, or intends it for a purpose other than for the sake of Allah, let him take his place in hell." (PT)
English reference (PT): Vol. 1, Book 1, Hadith 258 (PT)
Arabic reference (PT): Book 1, Hadith 269 (PT)