وَلِسُلَيْمَانَ الرِّيحَ غُدُوُّهَا شَهْرٌ وَرَوَاحُهَا شَهْرٌ ۖ وَأَسَلْنَا لَهُ عَيْنَ الْقِطْرِ ۖ وَمِنَ الْجِنِّ مَن يَعْمَلُ بَيْنَ يَدَيْهِ بِإِذْنِ رَبِّهِ ۖ وَمَن يَزِغْ مِنْهُمْ عَنْ أَمْرِنَا نُذِقْهُ مِنْ عَذَابِ السَّعِيرِ (12)
(34:12) And We subdued the wind to Solomon: its morning course was a month's journey and its evening course was a month's journey. *17 We gave him a spring flowing with molten brass, *18 and We subdued for him jinn who, by his Lord's permission, *19 worked before him. Such of them as swerved from Our commandment, We let them taste the chastisement of the Blazing Fire.
*17) For this also please refer to Al-Anbiya: 81 and E.N. 74 thereof.
*18) Some former commentators have taken this to mean that a spring from the earth had erupted for the Prophet Solomon from which molten copper flowed oat instead of water. But another interpretation of this verse can be that in the time of the Prophet Solomon the work of melting and moulding copper for different uses was done on a very large scale and the same has been referred to here as the flowing of a spring of molten copper for him. (For further details, see E.N. 74 of AI-Anbiya').
*19) The question whether the jinns who had been subdued to the Prophet Solomon were human beings of the mountain tribes or really the jinns who are well known by this name as the hidden creation, has been discussed in detail in our commentary of Surah AI-Anbiya' and Surah An-Naml. (Please see E.N. 75 of AI-Anbiya' and E.N.'s 23, 45 and 52 of An-Naml).