Panj B 40, f.184v, Guru Nanak and Duni Chand, illustration from the 'Biography of Guru...

Guru Nanak (15 April 1469 – 22 September 1539) was the founder of the religion of Sikhism and the first of the Sikh Gurus. His birth is celebrated world-wide on Kartik Puranmashi, the full-moon day which falls on different dates each year in the month of Katak, October–November. The Guru proceeded to the river Ravi and then to Lahore. The Lahore territory was then farmed from the Emperor by a millionaire Khatri, whose name was Duni Chand. He was performing the ceremony of Shradh (Shradhs are oblations of cakes and libations of water made to the spirits of deceased ancestors) for his deceased father, when he heard of the devout Nanak's arrival. He took the Guru to his house, and treated him with great affection. When everything was ready for the anniversary feast, Duni Chand began to feed the Brahmans.