The prayer rug makes any patch of ground clean and sacred for a moment. It is read as carrying your own sanctuary with you, and as discipline and devotion in daily life.
Has this come up in your dreams before? What was going on in your life then?
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.