Surah Yusuf, Verse 111

لَقَدۡ كَانَ فِي قَصَصِهِمۡ عِبۡرَةٞ لِّأُوْلِي ٱلۡأَلۡبَٰبِۗ مَا كَانَ حَدِيثٗا يُفۡتَرَىٰ وَلَٰكِن تَصۡدِيقَ ٱلَّذِي بَيۡنَ يَدَيۡهِ وَتَفۡصِيلَ كُلِّ شَيۡءٖ وَهُدٗى وَرَحۡمَةٗ لِّقَوۡمٖ يُؤۡمِنُونَ١١١

laqad kāna fī qaṣaṣihim ʿib'ratun li-ulī l-albābi mā kāna ḥadīthan yuf'tarā walākin taṣdīqa alladhī bayna yadayhi watafṣīla kulli shayin wahudan waraḥmatan liqawmin yu'minūna

There was certainly in their stories a lesson for those of understanding. Never was it [i.e., the Qur’ān] a narration invented, but a confirmation of what was before it and a detailed explanation of all things and guidance and mercy for a people who believe.