ابن إسحاق
The earliest biography of Muhammad, Ibn Ishaq (761–767) is lost but his collection of traditions survives mainly in two sources: Ibn Hisham (833) and al-Tabari (915). The story appears in al-Tabari, who includes Ibn Ishaq in the chain of transmission, but not in Ibn Hisham, who admits in the preface of his text that he omitted matters from Ibn Ishaq's biography that "would distress certain people". Ibn Sa'd and Al-Waqidi, two other early biographers of Muhammad relate the story. Scholars such as Uri Rubin and Shahab Ahmed and Guillaume hold that the report was in Ibn Ishaq, while Alford T. Welch holds the report has not been presumably present in the Ibn Ishaq.