There are many folk traditions that are equated with Orthodox church practices. Superstitions associated with holy water that are sanctified on the feast of the Epiphany are especially common.
Holy baptismal water, traditionally sanctified twice now: on Christmas Eve of Baptism and on the holiday itself, is a great Christian shrine. It is no coincidence that it is referred to in the Church as holy agiasma or great agiasma. The attitude of the Orthodox believer towards such water should be reverent. However, many people adhere to various popular superstitions associated with this, perhaps, one of the most significant shrines for Orthodox people.
In particular, many believe that it is necessary to draw holy baptismal water in seven churches. According to another interpretation - you should visit three temples in which you need to get water. The main thing in this misconception is that water should be drawn in several churches. Such water, according to some, is no longer just holy, but "super-holy." Moreover, it is obtained by mixing water from different temples.
This practice is alien to Orthodox perception and is ignorance of the essence and methods of sanctifying holy water. Such superstition can be safely attributed to magic, the preparation of an “Orthodox potion” by mixing various ingredients. A man expresses his distrust of the rank of great sanctification, trying to mix water from several temples to make it even "stronger".
In fact, the rite of great sanctification is one. The water consecrated in this way in different temples is exactly the same. All water acquires miraculous properties, divine grace descends on all water (sanctified in temples). Therefore, there is no need to draw water in seven, three or more churches. Mixing water will not betray the shrine even more grace.
It is worth noting that sorcerers, magicians and psychics often adhere to this practice. These people advise to draw holy baptismal water in different churches, and they themselves use this method for personal purposes, which is a clear example of magism, alien to Orthodox culture.
Thus, a person needs to protect himself from this kind of superstition. The Church negatively treats such practices as traditions that have nothing to do with Orthodox dogma.