Salaah

Can Tahajjud become fardh on a person?

Q: My question is about tahajjud...

My mother often, not regularly, wakes up for tahajjud and offers tahajjud namaaz as she cannot do so due to her health. She offers it regularly in Ramadhaan, Shawwal, Muharram and Zil Hajj, etc. (special months). Me and my sister also offer tahajjud daily Alhamdulillah.

Recently, one of my relatives told my mother that if you have started offering tahajjud namaaz or if you offered it one day, you cannot quit it. It becomes fardh for you. I told my mother that this is baseless since a nafal namaz cannot become fardh but she wants to confirm it. Please clarify this according to the Ahle-e-sunnat sect. 

Judging people performing salaah

Q: I pray in the female prayer room in the university I go to, so there’s usually a lot of people around me praying with me. Unfortunately, my brain keeps focusing on their salah and judging how they pray, instead of focusing on my own salah and my own mistakes. It’s a terrible habit I have and I’m really disappointed in myself for having these thoughts. Please, any tips to stop this from happening? Should I pray on my own next time, just to avoid passing judgements on others?