If a young or old has a nightmare or get scared while sleeping or just feeling false notions then on the chest of the patient, write
with your index figure. Insha’Allah all sorts of fears will be gone and the person would be safe from the devil’s evilness. It is mentioned in a hadith that the devil runs away from the name of Umar (May Allah Be please with him) and this is one of the blessing of his blessed name.