<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The mosque was built by Muhammad in 622, after his arrival in the city of Medina . Riding on a camel called Qaswa he arrived at the place where this mosque was built . The land was owned by Sahal and Suhayl, partly as a place for drying dates, and at one end had been previously used as a burial ground . Refusing to "accept the land as a gift", he bought the land and it took seven months to complete the construction of the mosque . It measured 30.5 m × 35.62 m (100.1 ft × 116.9 ft). The roof which was supported by palm trunks was made of beaten clay and palm leaves . It was at a height of 3.60 m (11.8 ft). The three doors of the mosque were Bab - al - Rahmah to the south, Bab - al - Jibril to the west and Babal - Nisa to the east . </P> <P> After the Battle of Khaybar, the mosque was "enlarged". The mosque extended for 47.32 m (155.2 ft) on each side and three rows of columns were built beside the west wall, which became the place of praying . The mosque remained unaltered during the reign of the first Rashidun caliph Abu Bakr . The second caliph Umar demolished all the houses around the mosque except that of Muhammad's wives to expand it . The new mosque's dimensions became 57.49 m × 66.14 m (188.6 ft × 217.0 ft). Sun - dried mud bricks were used to construct the walls of the enclosure . Besides strewing pebbles on the floor, the roof's height was increased to 5.6 m (18 ft). Umar moreover constructed three more gates for entrance . He also added the Al - Butayha for people to recite poetry . </P>

Who purchased the land for masjid e nabwi