Musannaf Ibn Abi Shayba 22:362

Muhammad ibn Abi ‘Adi narrated to us, from Dawud, from al-Sha‘bi, regarding the verse: "And We have already written in the Zabur (Psalms) after the Dhikr (Torah/Reminder)." He said: In the Zabur of Dawud, after the Dhikr of Musa.