Re: Shahbaz Qamar Fareedi - Maula naam
right I will get the right reference for you, I thought it was a well known Hadith!
after a little research: http://www.sunnah.org/sources/hadith_utlub_ilm.htm
also this topic is being discussed elsewhere on the web!
http://www.quora.com/Why-did-Muhammad-say-Seek-knowledge-even-unto-China