Musannaf Ibn Abi Shayba 3:2650

Abu Mu'awiyah narrated to us, from al-A'mash, from Abu Salih, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever performs ablution and perfects the ablution, then comes to the Friday prayer, and draws near, and remains silent, and listens, he is forgiven what is between him and the other Friday, and an addition of three days. And whoever touches the pebbles has engaged in idle talk."