Ruling 870 — Prayer (Ṣalāh)

Performing prayers on something that is unlawful to stand or sit on – such as a place on a mat that has the name of Allah the Exalted written on it – is not correct in the event that it prevents one from establishing an intention to attain proximity to Allah (qaṣd al‑qurbah). The fourth condition: the ceiling of the place where one performs prayers must not be so low that he cannot stand up straight; and the place must not be so small that there is no room to perform rukūʿ and sujūd.