Ibn Aun reports that it was mentioned to Muhammad (may Allah have mercy on him) that Umar ibn Abdul Aziz (may Allah have mercy on him) had written regarding children brought from the land of disbelief that they should not be made heirs without the testimony of witnesses. Upon this, he said that the Muhajirun and Ansar were made heirs on the basis of lineage from the time of ignorance, so I do not accept that he wrote this.