The Preservation and Authenticity of Hadith as a Source of SIrah: A critique of Robert Spencer ‘s Views on Historicity of Muhammad(ﷺ) 2018 Vol.7, No.1 البصیرہ October 11, 2019June 20, 2023nazia gohar Saeed Akhter Prof. Dr. Ata -ur-Rahman Pages: 1-18