Prophet Muhammad (peace and blessings of Allah be upon him) : “The supplication is the essence of worship.”
O Allah! I seek refuge in You from helplessness, indolence, cowardice, senility, and miserliness; and I seek Your Protection against the torment of the grave and the trials of life and death.
Muslim
Allah! I have considerably wronged myself. There is none to forgive the sins but You. So grant me pardon and have mercy on me. You are the Most Forgiving, the Most Compassionate
Al Bukhari
O Allah! I seek refuge in You from leucoderma, insanity, leprosy and evil diseases
Abu Dawud
O Controller of the hearts make my heart steadfast in Your religion
Tirmidhi
None has the right to be worshipped but Allah the Incomparably Great, the Compassionate. None has the right to be worshipped but Allah the Rubb of the Mighty Throne. None has the right to be worshipped but Allah the Rubb of the heavens, the Rubb of the earth, and the Rubb of the Honourable Throne
Bukhair & Muslim