Ismaili History 315 - Guardianship of Mutim bin Adi
On his return to Mecca during the night, Muhammad arrived at Nakhlah, and thence he moved to Hira. According to Ibn Sa'd (1st vol., p. 212), Muhammad sent words to Mutim bin Adi that he desired to return to Mecca, if he was assured protection. Mutim, although a non-believer, was a gentleman. He not only assured Muhammad of his protection according to Arabian custom, but called all of his sons who went to Kaba and remained on guard till he finished his religious obligations. Mutim also declared in Mecca that Muhammad was under his protection.
He was sorely stricken in heart and lived in Mecca for some time, retired from his people, preaching occasionally, but confining his mission mainly to the strangers who congregated in Mecca and its vicinity during the season of the annual pilgrimage