Understand who are narrating a particular hadith for authenticity and reliability purposes.

This hadith talks about the importance of understanding who are narrating a particular hadith. It is important to know who are the people that have passed on this information so that we can be sure that it is authentic and reliable. The narrator in this case was Sufyan and one of his companions was Abu 'Abdur-Rahman An-Nasai who stated that it was not Abu Ja'far Al-Farra'. This shows us how important it is to understand who has passed on a particular piece of information so we can be sure if it's reliable or not.