The comprehensive nature of the Qur'an

وَلَقَدْ ءَاتَيْنَـٰكَ سَبْعًا مِّنَ ٱلْمَثَانِى وَٱلْقُرْءَانَ ٱلْعَظِيمَ

And We have certainly given you, [O Muḥammad], seven of the often repeated [verses] and the great Qur’ān.