His prana is going away. You require mighty grace of God in order to get over these problems. Fear of death is the greatest fear. It is not the death of the mind that you are afraid of. You are afraid of the death of the body.
Nobody likes to die.
But the body will vanish. The fear of death is nothing but the fear of the loss of one's physical existence. That shows the wrong connection of the mind with the body. The mind is independent of the body, actually. It is not a slave of the body.