widely credited for standardising the Gurmukhī script as used in the sacred scripture of the Sikhs. Guru Amar Das became the third Sikh Guru in 1552 at the age of 73. He adhered to the Vaishnavism tradition of Hinduism for much of his life, before joining the commune of Guru Angad. Goindval became an important centre for Sikhism during the Guruship of Guru Amar Das. He was a reformer, and discouraged veiling of women's faces (a Muslim custom) as well as sati (a Hindu custom). He encouraged the Kshatriya people to fight in order to protect people and for the sake of justice, stating this is Dharma. Guru Amar Das started the tradition of appointing manji (zones of religious administration with an appointed chief called sangatias), introduced the dasvandh ("the tenth" of income) system of revenue collection in the name of Guru and as pooled community religious resource, and the famed langar tradition of Sikhism where anyone, without discrimination of any kind, could get a free meal in a communal seating. The collection of revenue from Sikhs through regional appointees helped Sikhism grow. Guru Amar Das named his disciple and son-in-law Jēṭhā as the next Guru, who came to be known as Guru Ram Das. The new Guru faced hostilities from the sons of Guru Amar Das and therefore shifted his official base to lands identified by Guru Amar Das as Guru-ka-Chak. He moved his commune of Sikhs there and the place then was called Ramdaspur, after him. This city grew and later became Amritsar – the holiest city of Sikhism. Guru Ram Das expanded the manji organization for clerical appointments in Sikh temples, and for revenue collections to theologically and economically support the Sikh movement. In 1581, Guru Arjan – the youngest son of Guru Ram Das, became the fifth Guru of the Sikhs. The choice of successor, as throughout most of the history of Sikh Guru successions, led to disputes and internal divisions among the Sikhs. The elder son of Guru Ram Das named Prithi Chand is remembered in the Sikh tradition as vehemently opposing Guru Arjan, creating a faction Sikh community which the Sikhs following Guru Arjan called as Minaas (literally, "scoundrels"). Guru Arjan is remembered in the Sikh for many things. He built the first Harimandir Sahib (later to become the Golden Temple). He was a poet and created the first edition of Sikh sacred text