At-Taialisi transmitted on the authority of 'Amro bin al-'As (RAA), 'The right of giving protection to non-Muslims is extended to the most humble of the believers (and all Muslims must respect it and give him support).' (ID)
English reference (ID): Book 11, Hadith 1338 (ID)
Arabic reference (ID): Book 11, Hadith 1311 (ID)