You searched for: “ophiomancy
ophiomancy
1. The recognition of serpents as agents of divination or fortune telling by their manner of eating, or by their coils.

The first incident is mentioned in the Garden of Eden and has been known to be utilized in Egypt, Greece, Rome, and among the Aztecs of Mexico.

2. Divination by means of serpents or the use of serpents to foretell the future or to divine the past.