"Nuestro Juramento" is a profound bolero composed by Puerto Rican artist Benito de Jesús and famously adapted into an iconic pasillo by Ecuadorian singer Julio Jaramillo in 1957. The song’s lyrics depict a deep, eternal vow of love that transcends death, turning a blood pact into a lasting romantic legacy. Upon its release, it became an international hit and solidified Jaramillo's status as a musical icon in Latin America. Following his death in 1978, the song became a powerful, enduring tribute sung by thousands.