“One who calls himself a Sikh of the True Guru shall get up early morning and meditate on the Lord’s Name. Make effort regularly to cleanse, bathe & dip in the ambrosial pool. Upon Guru’s instructions, chant Har, Har singing which, all misdeeds, sins and pains shall go away.”
Guru Ram Das (Friday October 9 1534 - Saturday 16 September 1581) was the fourth of the Ten Gurus of Sikhism and became Guru on Monday 16 September 1574 following in the footsteps of Guru Amar Das ji. The Guru's original name was Bhai Jetha. Before Guru Ji died, he nominated Guru Arjan Dev, who was his youngest son as the next Guru of the Sikhs.
Source: SikhiWiki