Musannaf Ibn Abi Shayba 21:261

Marwan ibn Mu'awiyah narrated to us, from 'Awf, from 'Abbas al-'Ammi, who said: It reached me that Dawud, the Prophet, peace be upon him, used to say in his supplication: "Glory be to You, O Allah. You are my Lord; You have exalted Yourself above Your Throne. You have placed Your fear upon those in the heavens and the earth. Therefore, the closest of Your creation to You in station are those most intense in their fear of You. And what knowledge does he have who does not fear You? Or what wisdom does he have who does not obey Your command?"