Sroash is a lesser divinity who personifies Obedience and also is the guardian of prayer. He along with others were invoked by Zoroaster a number of times as the 'other Ahuras' in the Gathas. Sraosh accompanying Mithra and Rashnu held the scales of justice which judge the soul according to previous thoughts, words, and acts to determine whether it was worthy to enter Paradise.
This divinity also was the genius of hearing and mediator between God and man. Sroash is the divine messenger most often mentioned in the Shah Nana. He presided over getig (physical world) just as Ohrrmazd rules over menog (spiritual world). Sroash acts as a psycho-pomp to the dying, and an observance of three days after the death is dedicated to him. A.G.H.
Boyce, Mary, Zoroastrians: Their Religious Beliefs and Practices, New York, Routledge, 2002, pp.