Mukhtasar Muslim (Abridged) 421 — Command to silence others during

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: When you say to your companion on the day of Jumu'ah, "Be quiet," while the Imam is delivering the sermon, then you have engaged in idle talk.