Guru Har Rai is famed to have met Dara Shikoh during a time Dara Shikoh and his younger brother Aurangzeb were in a bitter succession fight. Aurangzeb summoned Guru Har Rai, who refused to go and sent his elder son Ram Rai instead. The emperor found a verse in the Sikh scripture insulting to Muslims, and Ram Rai agreed it was a mistake then changed it. Ram Rai thus pleased Aurangzeb, but displeased Guru Har Rai who excommunicated his elder son. He nominated his younger son Guru Har Krishan to succeed him in 1661. Aurangzeb responded by granting Ram Rai a jagir (land grant). Ram Rai founded a town there and enjoyed Aurangzeb's patronage, the town came to be known as Dehradun, after "Dehra" referring to Ram Rai's shrine. Sikhs who followed Ram Rai came to be known as Ramraiya Sikhs. However, according to rough estimates, there are around 120–150 million (12–15 crore)</ref> Guru Har Krishan became the eighth Guru at the age of five, and died of smallpox before reaching the age of eight. No hymns composed by these three Gurus are included in the Guru Granth Sahib.