Musannaf Ibn Abi Shayba 21:746

Al-Fadl ibn Dukayn narrated to us, he said: Fitr narrated to us, from Abd al-Rahman ibn Sabit, he said: The Messenger of Allah (may Allah bless him and grant him peace) used to supplicate with these words and hold them in high regard: "O Allah, Reliever of anxiety, Remover of distress, Answerer of the call of the distressed, the Most Merciful of the world and the Hereafter and the Most Compassionate of them both, have mercy upon me today with a vast mercy by which You make me independent of the mercy of anyone other than You."