Have an accurate and reliable chain when reporting something.

This hadith is about the chain of Tawus reporting, which was mentioned before the previous hadith. A chain of narration is a way to trace back a report or story to its original source. It is important to have an accurate and reliable chain in order for a report or story to be accepted as true and authentic. In this case, it appears that there were two chains reported by Tawus - one through Wuhaib and another through Rowh bin Qasim - both of which were accepted as reliable sources. This shows us how important it is to have an accurate and reliable chain when reporting something so that we can trust its authenticity.