Musannaf Ibn Abi Shayba 3:2649

5026. Affan narrated to us, he said: Hammam narrated to us, from Qatadah, from al-Hasan, from Samurah, that the Prophet (may Allah bless him and grant him peace) said: "Whoever performs wudu for Jumu'ah, then it is good and excellent. And whoever performs ghusl, then that is better."