Sayyiduna Wabisah (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) delivering a sermon during the Farewell Pilgrimage, and he (peace and blessings be upon him) said: "Let the one who is present convey this to the one who is absent."
Hadith Referenceالمعجم الكبير للطبراني / باب الواو / 18621