Baba Nanak was the pioneer of Sikh religion but he also wrote poetry and wrote certain other things. This article analyses the impact of Muslim philosophy and Muslim saints on Nanak and his works. Nanak had close and friendly ties with some Muslim Sufis and had befriended some Sufis and musicians who belonged to Baba Fareed’s ‘jamat khana’. Some of the verses by Baba Fareed are included in Sikh scripture as well. The author has also quoted some verses by Allama Iqbal eulogising Baba Nanak.