Ka'b al-Ahbar (may Allah have mercy on him) said: Sayyiduna Suhayb (may Allah be pleased with him) told me, saying: The Messenger of Allah (peace and blessings be upon him) used to make this supplication: "O Allah, You are not a deity whom we newly devised, nor a lord whom we invented; nor did we have, before You, any deity to whom we would turn for refuge and abandon You; nor did anyone help You in creating us, that we should associate him with You. Blessed are You and exalted." Ka'b (may Allah have mercy on him) said: And this is how Allah's Prophet Dawud (peace be upon him) used to supplicate.
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7269