سورة الحجر

Imam Baqir (peace be upon him): وَ أَنبَتْنَا فِیهَا مِن کُلِّ شَیْءٍ مَّوْزُونٍ [And We caused to grow in it every kind of thing in due measure]; Allah the Blessed and Exalted has caused to grow in the mountains [mines of] gold, silver, jewels (precious stones), zinc, copper, iron, lead, kohl, and arsenic, such things being traded only by weight.

Ali ibn Ibrahim (may Allah have mercy on him): وَ الْأَرْضَ مَدَدْناها وَ أَلْقَیْنَا فِیهَا رَوَاسِیَ [And the earth, We have spread it out and cast in it firm mountains]; that is, [We placed] mountains [in the earth]. وَ أَنْبَتْنا فِیها مِنْ کُلِّ شَیْءٍ مَوْزُونٍ* وَ جَعَلْنا لَکُمْ فِیها مَعایِشَ وَ مَنْ لَسْتُمْ لَهُ بِرازِقِینَ [And We caused to grow in it of every thing in due measure. And We have made in it means of subsistence for you and for him for whom you are not the suppliers] means: for every living creature We have set a fixed measure.