Before the fall of the deities, Rasah was the goddess associated with obligations, promises and contracts. The youngest daughter of Shen-ak-Vhah, she was depicted as a young girl made of brilliant white marble with contracts and obligations carved into her. In honour of her form, and as part of their worship of her, followers of Rasah would tattoo contracts with the goddess onto their own bodies.
Since the fall, some city-states, including Vasini, have outlawed tattooing certain body parts (none have outlawed it entirely), to ensure that it isn’t the “covert” worship of the goddess.