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:90:12 –

And what can make you know what is ˹breaking through˺ the difficult pass?  

And what will show you, ˹what will˺ make known to you, what the obstacle is?, that he is to surmount — intended to emphasise its enormity (this statement is a parenthetical one). He explains the way to surmount it by saying:
القرآن:٩٠:١٢ –

وَمَا أَدْرَاكَ مَا الْعَقَبَةُ  

{وما أدراك} أعلمك {ما العقبة} التي يقتحمها تعظيما لشأنها، والجملة اعتراض وبين سبب جوازها بقوله:

See similar narrations below:

Collected by Qurʾān
quran:83:19 –

And what can make you know what is 'illiyyun?  

and what will tell you, ˹what will˺ inform you, what ‘Illiyyūn is?, what the book of ‘Illiyyūn is.
القرآن:٨٣:١٩ –

وَمَا أَدْرَاكَ مَا عِلِّيُّونَ  

{وما أدراك} أعلمك {ما عليون} ما كتاب عليين.