Ibrahim said: A man asked Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) to recite something (during the Jumu'ah sermon) while the imam was delivering the sermon, and Sayyiduna Abdullah (may Allah be pleased with him) did not answer him. When he had finished the prayer, Sayyiduna Abdullah (may Allah be pleased with him) said to him: "What you asked about was your share of the Jumu'ah (reward)."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9508