Musnad Ahmad 30:2550

Ibn Numayr narrated to us, he said: Muhammad—meaning Ibn ‘Amr—narrated to us, he said: Abu Salamah narrated to us, from Abu Hurayrah, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, Allah, the Almighty and Majestic, revealed the Quran in seven modes: All-Knowing, All-Wise, All-Forgiving, All-Merciful."