Hadith #6744 (Sahih Muslim)
Book: The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness
Narrator(s): Asim bin Kulaib
Grade: Sahih

Say:” O Allah, I beg of Thee righteousness and adhering to the straight path.”

Source: https://parallelquran.com/hadith/sahih-muslim-6744/