Hazrat Gangohi (Rahimahullah) would write the following on a blank page and give the person affected by Sihr to wear around his neck:
الهى رحم كن كرم كن بر حال فلان بن فلان
انك غفور رحيم انك سميع مجيب و انك على كل شئ قدير
Write the person’s name in place of فلان بن فلان