Surah Az-Zukhruf, Verse 1

Tafsir of 43:1

Which was revealed in Makkah بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ In the name of Allah, the Beneficent, the Merciful حم - تَنزِيلُ الْكِتَبِ مِنَ اللَّهِ الْعَزِيزِ الْعَلِيمِ (Ha-Mim. By the manifest Book.) means, plain and clear in both wording and meaning, because it was revealed in the language of the Arabs, which is the most eloquent language for communication among people. Allah says: إِنَّا جَعَلْنَهُ (Verily, We have made it) meaning, revealed it, قُرْءَاناً عَرَبِيّاً (a Qur'an in Arabic) meaning, in the language of the Arabs, eloquent and clear; لَعَلَّكُمْ تَعْقِلُونَ (that you may be able to understand.) means, that you may understand it and ponder its meanings. This is like the Ayah: بِلِسَانٍ عَرَبِىٍّ مُّبِينٍ (In the plain Arabic language.) (26:195) وَإِنَّهُ فِى أُمِّ الْكِتَبِ لَدَيْنَا لَعَلِىٌّ حَكِيمٌ (And verily, it is in the Mother of the Book with Us, indeed exalted, full of wisdom.) This explains the high status of the Qur'an among the hosts on high (the angels), so that the people of earth will respect it, venerate it and obey it.…

Source: Ibn Kathir (Abridged)