Musannaf Ibn Abi Shayba 21:61

Yazid ibn Harun narrated to us, he said: Imran ibn Hudayr informed us, from Abu Mijlaz, he said: Whoever fears injustice from a ruler and says: "I am pleased with Allah as a Lord, with Islam as a religion, with Muhammad as a Prophet, and with the Quran as a judge and a leader," Allah will save him from him.