Strange fortune-telling rituals

In some fortune-telling, the number 7 played an important role and each action was repeated 7 times, such as writing Surah Hamd 7 times on 7 pieces of clothing and burying it in 7 graves or cemeteries, washing the prayer sheet in water and drinking it for 7 days; obtaining water from 7 garis (i.e. from 7 jobs whose names had the suffix -gari).