Two words mentioned in the Qur'an are mukhlis (with I) and mukhlas (with A). They come from the same root word as "ikhlaas," which means sincerity.
The former is often translated as "a person of sincerity"...
It is known that prayers are accepted wherever you perform them — washrooms and graveyards notwithstanding — and that it is not required to go to an actual masjid building to pray. As the prophet said,...