We have divided the Qur'an into parts that you may recite it to men slowly, with deliberation. That is why We sent it down by degrees.
و قرآن را به تفاريق نازل كرديم تا تو آن را با تأنى بر مردم بخوانى و نازلش كرديم، نازل‌كردنى به كمال.