Before his death, Guru Angad, following the Example set by Guru Nanak, nominated Guru Amar Das as his successor (The Third Nanak), instead of choosing his own son. Before he converted to Sikhism, Amar Das had been a religious Hindu (Vaishnava), when one day he heard Bibi Amro, the daughter of Guru Angad singing a hymn by Guru Nanak. Amar Das learnt from her about Guru Angad, and with her help met the second Guru of Sikhism in 1539. From then on, Amar Das renounced his Vaishnava practice and became a disciple of Guru Angad, who was much younger than himself .