Hafidhh Asqalani writes: ???Qaadhi Abu Bakr Ibn Arabi, in his commentary on Bukhari, claims that Imam Bukhari has written narration in Sahih-ul-Bukhari and that they have been narrated by at least two persons e.g. two companions heard a narration from our Prophet [May Allah bless Him and grant Him peace] and then two of the companions??? students heard it from the companions themselves, and so on.