Explanation:

Several months before March 1699, Guru Gobind Singh invited his followers from all over India to a special congregation at Anandpur on Vaisakhi Day, 30 March 1699. As a result, on that particular day many hundreds of devotees and onlookers had gathered at Anandpur Sahib. Many had come as a sign of respect for the Guru and in accordance to his invitation while some had just come out of curiosity. On the appointed day, the Guru addressed the congregants with a most stirring oration on his divine mission of restoring their faith and preserving Dharam (righteousness).

After his inspirational discourse, he flashed his unsheathed sword and said that every great deed was preceded by equally great sacrifice. He asked, with a naked sword in his hand, "I need one head. Is there anyone among you, who is ready to die for his faith?"After a few minutes, a brave Sikh from Lahore named Daya Ram stood up and offered his head to the Guru. The Guru took him to a tent pitched close by, and after some time, came out with a blood dripping sword.