Adi Granth (or Aad Granth, literally "the FIRST/Beginning scripture" - as in the Mool Mantar; "Aad Sach, Jug Aad Sach", True in the Beginning, True for All time) is the early compilation of the Sikh Scriptures by Sri Guru Arjan Dev Ji, the fifth Sikh Guru, in 1604. This Granth ("collection of bani") is the Holy Scripture of the Sikhs. The tenth Sikh Guru, Guru Gobind Singh added further holy Shabads to this Granth during the period 1704 to 1706. Then in 1708, before his death, Guru Gobind Singh affirmed the Adi Granth as the perpetual Guru of the Sikhs and the Granth then became known as the Sri Guru Granth Sahib.
Read more about Adi Granth: Timeline, Compilation, Bani Included in The Granth, The Journey With The Pothis, The Inscription of The Granth, The Granth Completed, Binding The Granth, The Granth Arrives, Reverence and Respect