Hymn qualities of God and why one should meditate on God's name. The "Guru Granth Sahib" is divided by their musical setting in different ragas into fourteen hundred and thirty pages known as "Angs" (limbs) in Sikh tradition. Guru Gobind Singh (1666–1708), the tenth guru, after adding Guru Tegh Bahadur's bani to the Adi Granth affirmed the sacred text as his successor, elevating it to "Guru Granth Sahib". The text remains the holy scripture of the Sikhs, regarded as the teachings of the Ten Gurus. The role of Guru Granth Sahib, as a source or guide of prayer, is pivotal in
Sikh scriptures They have been referred to as the "Key to the Sri Guru Granth Sahib" by Guru Arjan Dev, the fifth Sikh guru. He was the first scribe of Guru Granth Sahib and a scholar of great repute. From his work, it is clear that he had mastery of various Indian languages and had studied many ancient Indian religious scriptures. Panjab Digital Library in collaboration with the Nanakshahi Trust took up digitization of Sikh scriptures in 2003. Thousands of manuscripts have been digitized and are available online at Panjab Digital Library. Sikh scriptures The principal Sikh scripture is the "Adi Granth"