Musnad Abu Ya'la al-Mawsili 42:158

Muhammad ibn Yahya narrated to us, Fudayl ibn Sulayman narrated to us, Kathir ibn Qaruwanda narrated to us, from Abu Ja'far Muhammad ibn Ali, who said: I asked Abu Sa'id al-Khudri about the saying of Allah, "Indeed, He who imposed the Qur'an upon you will surely return you to a place of return" (Al-Qasas: 85). He said: His place of return is his afterlife.