Sura Yūsuf 12:52

ذَٰلِكَ لِيَعْلَمَ أَنِّى لَمْ أَخُنْهُ بِٱلْغَيْبِ وَأَنَّ ٱللَّـهَ لَا يَهْدِى كَيْدَ ٱلْخَآئِنِينَ

dhālika li-yaʿlama annī lam akhunhu bil-ghaybi wa-anna allāha lā yahdī kayda l-khāʾinīna

"This (say I), in order that He may know that I have never been false to him in his absence, and that Allah will never guide the snare of the false ones.

Sura Yūsuf 12:111

لَقَدْ كَانَ فِى قَصَصِهِمْ عِبْرَةٌ لِّأُو۟لِى ٱلْأَلْبَٰبِ مَا كَانَ حَدِيثًا يُفْتَرَىٰ وَلَٰكِن تَصْدِيقَ ٱلَّذِى بَيْنَ يَدَيْهِ وَتَفْصِيلَ كُلِّ شَىْءٍ وَهُدًى وَرَحْمَةً لِّقَوْمٍ يُؤْمِنُونَ

la-qad kāna fī qaṣaṣihim ʿibratun li-lūlī l-albābi mā kāna ḥadīthan yuftara wa-lākin taṣdīqa alladhī bayna yadayhi wa-tafṣīla kulli shayʾin wa-hudan wa-raḥmatan li-qawmin yuʾminūna

There is, in their stories, instruction for men endued with understanding. It is not a tale invented, but a confirmation of what went before it,- a detailed exposition of all things, and a guide and a mercy to any such as believe.