Musnad Ahmad 30:2357

Abu Mu'awiyah narrated to us, Al-A'mash narrated to us, from Abu Salih, from Abu Hurairah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever performs ablution on Friday and performs the ablution well, then comes to the Friday (prayer) and draws near, remains silent, and listens, he will be forgiven for what is between him and the Friday, and an addition of three days." He said: "And whoever touches the pebbles has engaged in idle talk."