Naanak gur santokh rukh dharam ful fal gi-aan
Ras rasi-aa hari-aa sadaa pakai karam dhi-aan
pat kay saad khaadaa lahai daanaa kai sir daan
..................
Reference: Aakhya Baba Nanak Ne, Editor Shafqat Tanvir Mirza
English Translation
O Nanak the Guru is the tree of contentment, with flowers of faith, and fruits of spiritual wisdom. Watered with the Lord's Love, it remains forever green; through the karma of good deeds and mediation, it ripens. Honor is obtained by eating this tasty dish; of all gifts, this is the greatest gift.
Translation: S. S. Khalsa