The great Emperor of India, King Akbar, went to go visit the Guru. Guru Amar Das Dev ji wouldn't see the visiting royalty until his guest had eaten in the Guru's langar. So this great ruler of the whole land sat along side all kinds of common people and ate langar. Emperor Akbar was impressed that the Guru served so many people, and was humbled that Guru Amar Das didn't consider anyone higher or lower.