ཤེས་རབ་ཀྱི་ཕ་རོལ་ཏུ་ཕྱིན་པ་ཚད་མྱེད་དོ། །
Since space is immeasurable, the serial steps of meditative absorption are immeasurable, and since the serial steps of meditative absorption are immeasurable, the perfection of wisdom is immeasurable.
Emptiness, Perfection of Wisdom, Boundlessness