It is incumbent on those who are present [in a religious meeting (or conference)] to convey the knowledge to those who are absent

Narrated Abu Bakra: The Prophet (sallallahu 'alaihi wa sallam) said. No doubt your blood, property, the sub-narrator Muhammad thought that Abu Bakra had also mentioned and your honor (chastity), are sacred to one another as is the sanctity of this day of yours in this month of yours. It is incumbent on those who are present to inform those who are absent." (Muhammad the Sub-narrator used to say, "Allah's Messenger (sallallahu 'alaihi wa sallam) told the truth.") The Prophet (sallallahu 'alaihi wa sallam) repeated twice: "No doubt! Haven't I conveyed Allah's message to you.