Surah Saba 34:12

وَلِسُلَيْمَـٰنَ ٱلرِّيحَ غُدُوُّهَا شَهْرٌ وَرَوَاحُهَا شَهْرٌ ۖ وَأَسَلْنَا لَهُۥ عَيْنَ ٱلْقِطْرِ ۖ وَمِنَ ٱلْجِنِّ مَن يَعْمَلُ بَيْنَ يَدَيْهِ بِإِذْنِ رَبِّهِۦ ۖ وَمَن يَزِغْ مِنْهُمْ عَنْ أَمْرِنَا نُذِقْهُ مِنْ عَذَابِ ٱلسَّعِيرِ

And to Solomon [We subjected] the wind - its morning [journey was that of] a month - and its afternoon [journey was that of] a month, and We made flow for him a spring of [liquid] copper. And among the jinn were those who worked for him by the permission of his Lord. And whoever deviated among them from Our command - We will make him taste of the punishment of the Blaze.

Translation: Saheeh International

Tafsir

And We disposed for Solomon the wind the nominative reading of al-rīhu would be based on an implicit missing verb sakhkharnā ‘We disposed’ its morning course meaning its journey from the morning to the noon was a month’s journey and its evening course that is its journey from the noon to sunset was a month’s journey. …

Excerpt from Tafsir al-Jalalayn, commentary on 34:12, via Quran.com. The reader has the full commentary and 9 more tafsirs.