Living water
In Scripture’s plain sense, living water is moving water — a spring or flowing stream, as opposed to the still water of a cistern. Jesus offers it as a gift to whoever asks (John 4:10) and speaks of it flowing out from within the one who comes to him (John 7:38) — which John identifies as the Spirit (John 7:39). Synonyms: mayim chayyim, running water, flowing water, spring water.