Musannaf Ibn Abi Shayba 28:468

Narrated to us Isa ibn Yunus, from Ibn Jurayj, from Abu al-Zubayr, who said: We said to Jabir ibn Abdullah, "Do the Majus (Zoroastrians) enter the Sacred Precinct (Haram)?" He said, "As for the people of our Dhimma (protected subjects), then yes."