Hammad bin Zayd حماد بن زيد بن درهم الأزدي الأزرق · Chapters on Supplication

“In one sitting of the Messenger of Allah (ﷺ), one could count that he said a hundred time, before he would get up: ‘O my Lord, forgive me, and accept my repentance. Verily, You are the Oft-Returning, the Most Forgiving (Rabbighfirlī watub `alayya innaka antat-Tawwābul-Ghafūr).’”

when he was in distress, the Prophet of Allah (ﷺ) would supplicate: “There is none worthy of worship except Allah, the Forbearing, the Wise, there is none worthy of worship except Allah, the Lord of the Magnificent Throne, there is none worthy of worship except Allah, the Lord of the heavens and the earth, and the Lord of the Noble Throne (Lā ilāha illallāh al-`aliyyul ḥalīm, lā ilāha illallāh, rabbul-`arshil-`aẓīm, lā ilāha illallāh, rabbus-samāwāti wal-arḍi wa rabbul-`arshil-karīm).”

“Ask Allah of His Bounty. For verily, Allah the Mighty and Sublime, loves to be asked, and the best of worship is awaiting relief.”