Doubt after completing an act of worship

Reference: Sharh ‘Umdatil-Fiqh – Tape No.6, Question No.62

Question: After completing the prayer, I began to doubt whether I [sat and] recited the first tashahhud or not. So what is the ruling [regarding that]?

Response: [The ruling regarding] doubt after completing an act of worship is not to let it concern you. Do not let it concern you, once you have completed the act of worship.

Abu 'Abdullaah

- from London, UK. He is a graduate of the Islaamic University of Madeenah, having graduated from the Institute of Arabic Language, and later the Faculty of Sharee'ah in 2004.