Remembering Your Sins
It is reported that Masrūq – Allāh have mercy on him – said:
Everyone should have times when they sit alone, remember their sins, and thus seek [Allāh’s] forgiveness for them.
Aḥmad b. Ḥanbal, Al-Zuhd article 2038.
Also read
Related sayings.
Plagues and the likes are times to exert oneself in worship.
What to do and not do when you see your brother has committed a sin.