1º_ Selah is a city in Yakima County, Washington, USA. 2º_ It is a spelling little used in Spanish for sela (Hebrew liturgical voice).
In the context of a prayer or psalm it is a pause for reflection or meditation. It means pause, interlude, or interlude. Washington, U.S. city name. Book Name by Alex Willmott. In Hebrew it translates sorrow. Stop, listen.
Augustine described forever, is an interlude or pause after or before prayer