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: Every sermon in which there is no testimony is like a severed hand.
Hadith Referenceالفتح الربانی / أبواب صلاة الجمعة وفضل يومها وكل ما يتعلق بها / 2783