Surah Ar-Ra'd (The Thunder) — Chapter 13 of the Holy Quran, a Medinan surah with 43 verses.
These sublime verses in this Sūrah, and the Qur’ān that God has revealed to you - O Messenger - is the truth in which there is no uncertainty. There is no doubt that it is from God, but most people do not believe in it due to stubbornness and pride.