Bhai Mai Das
Bhai Mai Das was a devout Sikh of Guru Amar Das. He was one of 22 Manjis established by Guru Amar Das. He preached Sikhism in Majha area.
Bhai Mai Das, a strict Vaishnav came in contact with Guru Amar Das and became his disciple. When he came to see the Guru he was informed that unless he would eat in the Guru's Langar he would not be permitted to meet with the Guru. Being a strict Vaishnav he did not do that, so he left the place to complete his pilgrimage.
According to Sikh history, one day he heard a voice, ”You have not eaten food from the Guru’s kitchen and you did not see him, so you will not obtain perfection. If you desire to do so then first behold Guru Amar Das.” Upon this Bhai Mai Das returned to Goindwal and partook langar and then was allowed to see the Guru. The Guru welcomed him, “Come, Mai Das, thou art a special saint of God.” The Guru initiated him as his Sikh, gave him “naam” and bestowed on him the spiritual power of conferring salvation on others.