An all-encompassing du’a which covers all the du’as of Rasullullah (Sallallahu Alayhi Wasallam)’s twenty-three year lifespan [of Prophethood]:
اللهم اني اسالك من خير ما سالك منه نبيك محمد صلي الله عليه وسلم و اعوذبك من شر ما استعاذك منه نبيك محمد صلي الله عليه واله وسلم و انت المستعان و عليك البلاغ ولا حول ولا قوة الا باللهTransliteration: “Allahumma inni as-aluka min khayri ma sa-alaka minhu nabiyyuka Muhammad Sallallahu Alayhi Wassallam wa a’oozubika min sharri mas-ta’aazanaka minhu nabiyyuka Muhammad Sallallahu Alayhi Wasallam wa anta al-musta’aana wa ‘alayka al-balaghu wa la hawla wa la quwwata illa billah.”
Hadhrat Abu Umamah (RA) narrates that Rasulullah (Sallallahu Alayhi Wasallam) made a lot of du’as, but a few of us could not remember all of them.
We complained of this to Rasulullah (Sallallahu Alayhi Wasallam), who said: “Should I not teach you such a du’a that will include all those du’as? Say, Oh Allah, I ask of you all the goodness which Muhammad (SAWS) asked of, and I seek refuge in all the things from which Muhammad (SAWS) has sought refuge from. Only You are capable of helping us and your function is only to convey the message of the truth. There is no strength to refrain from sins, but with the protection of Allah, and there is no power to accomplish good deeds, but with the help of Allah.”
[Tirmidhi (with a Hasan chain), Riyadh us-saliheen and 'Hisne-Haseen' of Imam Muhammed bin Muhammed Al-Jaziri]