If one sees himself turning in his sleep and putting his face down, or resting on his stomach in a dream, it means that he will turn away from his faith and lose both his earnings in this world and in the hereafter. If one sees the reverse, which is turning from resting on one’s stomach to lying on his back in a dream, it means that he will repent for his sins. It also represents his willingness to face the people and to correct his wrongdoing. If the subject is a woman, then sleeping on her stomach in a dream means that she is refusing to sleep with her husband. (Also see Running away | Take a flight | Sleep)
Read more about dreaming of Turning in one’s sleep in other dream meanings interpretations.