Step 1: Define a mandala. A mandala is a spiritual and ritual symbol representing the universe. It is a complex, abstract design that is usually circular in form.
Step 2: Analyze its use in different religions. While geometric spiritual diagrams exist in Hinduism (like yantras), the specific practice of creating elaborate mandalas as a meditative, painstaking ritual—often using colored sand and then ceremonially destroying them to symbolize impermanence—is a hallmark of Vajrayana or Tibetan Buddhism.
Step 3: Conclude based on the description. The description of a sacred, meditative, and painstaking process strongly points to the sand mandala tradition in Tibetan Buddhism.