Ubare Khan met the Guru and asked him whether he was a Hindu or a Muslim.
This conclusion is suggested by the salutation with which the manuscript concludes: bolahu vahi guru ji ki fatai hoi.
All agree that Lehna remained with Guru Nanak for a minimum period of 3 years and a maximum period of 7-8 years.
He has recorded this incident in his own words.
It only mentions that the Muslims also used to listen to Guru Nanak, and sometimes they even had religious discourses with him.
The Encyclopaedia Britannica contends that the Granth actually contains the composition of many people.