At-Tazkiyah -

Mujāhadah doesn’t mean to sleep on the floor when there is a bed to sleep on, nor does it mean to use cold water when warm water is available; mujāhadah is to compel the nafs to obey the commands of Allāh ta‘ālā when it does not want to comply.

Shaykh Mawlānā Muhammad Saleem Dhorat hafizahullāh