According to search-discovered classical Islamic scholarship, the 'spring of molten copper' (عَيْنَ الْقِطْرِ - 'ayn al-qitr) mentioned in Surah Saba (34:12) was a profound miracle bestowed by Allah upon Prophet Sulaiman (Solomon). Tafsir authorities such as Ibn Kathir and Al-Tabari explain this was not a natural phenomenon but a supernatural flowing source of liquid copper, provided without the need for mining or smelting. This divine gift was a key resource for the jinn, who were subservient to Sulaiman, to construct magnificent edifices, large basins, and other works for his kingdom. The linguistic choice of 'al-qitr', stemming from the root meaning 'to flow', distinctly emphasizes the liquid, effortless nature of this provision, setting it apart from ordinary copper (nuhas) and highlighting its miraculous status. This event stands as a powerful symbol of Allah's omnipotence and the immense blessings granted to His prophets, coupled with the reminder for constant gratitude.