Analysis of information sources in references of the Wikipedia article "คุรุซิกข์" in Thai language version.
The author of the Dabistan refers to the belief of the Sikhs in the unity of Guruship. The spirit of Guru Nanak entered the bodies of his successors - Guru Angad, Guru Amar Das, Guru Ram Das and Guru Arjan. That was why each Guru was referred to as mahal: Guru Nanak as the first mahal, Guru Angad as the second mahal, and in this way Guru Arjan as the fifth mahal. A Sikh who does not regard Guru Arjan as Baba Nanak is not a true Sikh. The firm belief of the Sikhs is that all the Gurus are Nanak. Indeed, Bhai Gurdas underscores the unity of Guruship from Guru Nanak to Guru Hargobind in one of his Vaars. This is reiterated in another Vaar in which the metaphors of light and water are used to emphasize that they all are the same.The idea of the unity of Guruship emphasized by Bhai Gurdas legitimized the succession of Guru Hargobind to face the rival claim of Prithi Chand and his descendants.
