Parh parh gaddee ladee-ah
parh parh bharee-ah saath
Path parh bayrhee paa-ee
parh parh dadee-ah khaat
Naanak laykhai ik gal
Hor ha-umai jhakh-naa jhaak
..................
Reference: Aakhya Baba Nanak Ne, Editor Shafqat Tanvir Mirza
English Translation
You may read and read loads of books; you may read and study vast multitudes of books. you may read and read boat-loads of books; you may read and read and fill pits with them. O Nanak, only one thing is of any account: everything else is useless babbling and idle talk in ego.
Translation: S. S. Khalsa