The disbelievers say, "Why has not the entire Qur'an been sent down to this man all at nce?" -Well, this has been done to impress it deeply on your mind, and (for the same object) We have sent it down piecemeal by degrees.
不信道者曾说：怎么不把全部《古兰经》一次降示他呢？我那样零零星星地降示它以便我凭它来坚定你的心，我逐渐降示它。