Question:

Is the mark on the forehead caused by prostration considered one of the signs of the righteous?

Answer:

This is not among the signs of the righteous. Rather, the signs are the light that appears on the face, openness of the chest (inner peace), good character, and similar traits. As for the physical mark left by prostration on the face, it may appear on the faces of those who only pray the obligatory prayers due to thinness of the skin, and it may not appear on the face of someone who prays frequently and prolongs prostration.