This Is My Faith - Al-fatlawi, Ali - الصفحة ٣٢٨ - The Meaning of the Hereafter (Mi’ad)
Anwar: What is soul?
Hasan: It is an abstract creature, i.e. it is not material.
Anwar: So, human being is made of a material body and an abstract soul, isn’t it?
Hasan: Yes, it is.
Anwar: Can you support this with a proof?
Hasan: Through witnessing science, we know that there is something part from the body, which is the soul; this Holy Verse from the Noble Quran confirms this fact:
(And do not speak of those who are slain in Allah's way as dead; nay, they are alive, but you do not perceive)٢;١٥٤.
This Holy Verse is a proof to the fact that the soul stays alive even when it leaves the body.
Anwar: Very Good. This leads to another question; is there a life in the grave?
Hasan: Yes, there is. It is called Purgatory life (Al-Barzakh), which is a life the soul lives between this world and the next world.