Bhai Dayal Dass Ji was son of Bhai Mai Dass and younger brother of martyr Bhai Mani Singh ji. His grandfather, Balu Ram had attained martyrdom while fighting in Guru Hargobind's first battle of faith against the Mughals. His ancestors belonged to Alipur near Multan. Bhai Mai Dass came to Kiratpur for an audience with Guru Har Rai in 1657 A.D. While returning, he left his three elder sons for service of the Guru's institution. Bhai Dayal Dass was fifteen when he entered the Guru's institution. On recommendation from Diwan Durga Mall, Guru Tegh Bahadur made him minister for domestic affairs. In 1665 A.D., when Guru Tegh Bahadur went to Assam from Patna, he left him at Patna to look after his family. The birth of (Guru) Gobind Singh took place under his care and service and he looked after the prince till he reached Anandpur. After sending the Kashmiri Brahmins back on the 25th May, 1675 A.D., Guru Tegh Bahadur decided to go to Agra for courting arrest. Before leaving Anandpur, he asked his principal devotees to ask for any blessing they had at heart. All were unanimous in their reply, 'That we be granted permission to accompany you to Agra." Bhai Dayal Dass was also one of those Sikhs who had been arrested ahead of the Guru. On the 9th November, 1675 A.D., the qazis ordered that Bhai Dayal Dass be seated in a cauldron of boiling water. On hearing the ruling, Bhai Dayal Dass asked leave of the Guru. The Guru said, "Brother, your service has borne fruit due to which your turn has come before mine. Great are you and blessed is your devotion. What pleasure can be greater for me than to see my lifelong devotees sacrificing their lives for the protection of human rights even ahead of me. May God bless you with success." Before putting Bhai Dayal Dass in the cauldron of boiling water, the qazis said, "There is still time. Embrace Islam and save yourself from pains otherwise you will face greater agony than your companion. You have seen how cruelly he was sawn." Bhai Dayal Dass replied, "You could not harass my companion. Did you notice, how calmly he was meditating on the word of his Guru when he was being sawn. Having made mockery of bodily pains, he had diffused into the Supreme Being. Hurry up and let my soul attain unity with the Lord." On his reply in the negative, the executioners sat him in the cauldron of boiling water. He stayed on sitting in the water with an unwavering mind. His flesh separated from his bones and his soul merged into the Supreme Being.
Bhai Dayala Ji was one of those Sikhs who were allowed by Sri Guru Teg Bahadur Sahib to remain with him and be arrested along with him under the orders of Emperor Aurangzeb. The other two were Bhai Mati Dass and Bhai Sati Dass.
Aurangzeb who was determined to convert the entire Hindu population of India into Islam even by force was immensly pleased by the message of