Respected Dr. Shabbir Sahab,
1. Can we endorse a Biblical reference which is not mentioned in Al-Qura'an anywhere?
2. If Allah had appointed Prophet for every community, and Muhammad (S) is the only Prophet in the lineage of Prophet Ismail, then how the community of Makkah in particular and Arab in general were being guided in between Prophet Ismail till Prophet Muhammad (S), (must be a lot of centuries in between them)?