Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) says that the Messenger of Allah (peace and blessings be upon him) made a peace treaty with the people of Najran for two thousand garments. In the aforementioned hadith it says: "Their places of worship shall not be demolished, no priest of theirs shall be expelled, and they shall not be turned away from their religion, as long as they do not introduce something new or consume usury (riba)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجزية / 18715
Ikrimah narrates from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both): In any city that the Arabs have founded, the non-Arabs may not build places of worship in it, nor are they permitted to strike the clapper-bell (naqus), nor may they bring wine or pork into it. And in any city that the non-Arabs have founded, the Arabs must fulfil their covenant with them and must not burden them beyond their capacity.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجزية / 18716