Explanation:

Guru Nanak went to Mecca on his 4th (last) udassi (journey/travel). Bhai Mardana went with him and he put on a blue dress worn by hajjis or Muhammadens who went on pilgrimage in those times, with him he took a Faqirs staff in his hand a collection of his hymns under his arm, with a jug(lota) for ablutions, thus he was in the guise of a hajji. Guru Nanak had now been on his Udasis (travels) for at least twenty years, since his sudden disappearance (around 1497) which had alarmed his followers and given some who were jealous of his growing influence to start all sorts of mischief, even accusing him of being a thief and stealing from Daulat Khan's stores.

During that time he had visited most of India going to the east as far as Assam and Burma; to the South as far as Sri Lanka (known also as Ceylon and Saran Deep) and to the north he had even crossed the Himalayas visiting Tibet and China. He and his tireless companions had travelled on foot and lived off the land and the generosity of others, Many of whom had become his followers.