The most comprehensive dua that covers everything
Allahumma inni as’aluka minal-khayri kullihi ajilihi wa ajilhi ma alimtu minhu wa ma lam ‘alam. Wa a’udhu bika minash-sharri kullihi ajilihi wa ajilihi ma ‘alimt minhu wa ma lam ‘alam.
O Allah, I ask You for all that is good, in this world and in the Hereafter, what I know and what I do not know. O Allah, I seek refuge with You from all evil, in this world and in the Hereafter, what I know and what I do not know.
(Sunan Ibn Majah 3846)