Musnad Ahmad 30:570

'Abd al-Razzaq narrated to us, Ibn Jurayj informed us, al-'Abbas narrated to me a hadith from Muhammad ibn Maslamah al-Ansari, from Abu Sa'id al-Khudri and Abu Hurayrah: That the Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, there is an hour on Friday; no Muslim servant coincides with it while asking Allah, the Almighty and Majestic, for good, but He gives it to him. And it is after the 'Asr prayer."