Occasion of Revelation (Sahih — Agreed Upon):
When Jibril brought revelation, the Prophet ﷺ would move his lips, fearing he might miss something. So Allah revealed:
"Do not move your tongue with it to hasten it." Ibn Abbas reported: Thereafter, the Prophet would remain still when Jibril came, and when he left he would recite exactly as Allah had promised.
Significance:
- Allah guarantees both collection of the Quran in the Prophet's heart and its recitation
- Allah also guarantees the clarification of its meanings to the Prophet
- The Prophet need not worry — preservation is a divine responsibility
Related verse: "And do not hasten the Quran before its revelation is completed to you" (Taha: 114).
Question: Why did the Prophet ﷺ move his lips while the revelation descended?
Answer: Fearing he might miss something. Allah then assured him He guarantees its collection, preservation, and explanation.