Ahmad ibn Hanbal
His work Al-Sahifah al-Sadiqah remained in his family and was used by his grandson 'Amr ibn Shu'ayb. Ahmad ibn Hanbal incorporated the whole of the work of Abd Allah ibn 'Amr in his voluminous book Musnad Ahmad ibn Hanbal thereby covering up for the missing Al-Sahifah al-Sadiqah which was written in the days of Muhammad.