Sixteen rounds is 1,728 recitations of the sixteen-word mantra, and it takes about two hours done attentively. Initiated devotees vow it. Most do it before breakfast, standing or walking, often outdoors, and treat a day when it is not finished as a day owed. The number was Prabhupada's concession to Western students — he had begun by asking for sixty-four. Devotees measure their own practice in years of unbroken rounds, and the movement's pastoral literature is largely about what to do when the count is kept and the attention is not.