Have a reliable source for transmitting information .

This hadith is about the chain of transmitters and narrators. It speaks to the importance of having a reliable source for transmitting information. In this case, it was Abdullah who was part of the chain that transmitted this particular hadith. The concept behind this is that when something is transmitted from one person to another in a continuous manner, it can be trusted as an accurate source. This means that if something has been passed down through generations in an unbroken line, then it can be considered reliable and trustworthy information. It also speaks to the importance of having a reliable narrator or transmitter so that we can trust what we are hearing or reading as being true and accurate.