Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:18:91 –

Thus. And We had encompassed ˹all˺ that he had in knowledge.  

So ˹it was˺, in other words, the situation was as We have stated; and We encompassed whatever pertained to him, that is, what Dhū’l-Qarnayn possessed in the way of machinery, men and otherwise, in knowledge.
القرآن:١٨:٩١ –

كَذَٰلِكَ وَقَدْ أَحَطْنَا بِمَا لَدَيْهِ خُبْرًا  

{كذلك} أي الأمر كما قلنا {وقد أحطنا بما لديه} أي عند ذي القرنين من الآلات والجند وغيرهما {خبرا} علما.