Translation of the verse 12 from Surah Al-Balad : Number of verses 20 - - page 594 - Part 30.
And what will make you know the path that is steep?
And what can make you know what is [breaking through] the difficult pass?
(90:12) And what do you know what that difficult steep is?
Source : Al-Balad Verse 12: And what can make you know what is [breaking through] the difficult pass?