The Huachipaire are an indigenous ethnic group speaking the Harákmbut language and living in Peru’s southern Amazon tropical forest. The Eshuva or sung prayer is an expression of Huachipaire religious myths, performed for healing or as part of traditional ceremonies such as the drinking of masato, a traditional beverage made of fermented manioc, and the initiation of new Eshuva singers. According to oral tradition, the Eshuva songs were learned directly from the forest’s animals, and are sung to summon nature spirits to help to alleviate illness or discomfort or promote well-being. Eshuva songs are performed without musical instruments and sung only in the Harákmbut language. As such they play a key role in safeguarding the language and preserving the group’s values and worldview. Transmission takes place orally, with the singer teaching apprentices the specific function of each song according to the ailment it is meant to heal.