A call to prayer drifting over rooftops is read as a summons to pause and turn inward. Tradition takes it as the reminder of something larger than daily worries, whatever your own beliefs.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.