Sentence:  ... at that very moment a loud and high-pitched voice broke the outer silence of the night. It was Chielo, the priestess of Agbala, <WSD>prophesying</WSD>. There was nothing new in that. Once in a while Chielo was possessed by the spirit of her god and she began to <WSD>prophesy</WSD>. 
Meaning of the word marked with <WSD> tags:  To speak or write with divine inspiration; to act as prophet. (from 14th c.)