Quran Al-Kahf 18:7
إِنَّا جَعَلۡنَا مَا عَلَى ٱلۡأَرۡضِ زِينَةٗ لَّهَا لِنَبۡلُوَهُمۡ أَيُّهُمۡ أَحۡسَنُ عَمَلٗا
Translation
Indeed, We have made that which is on the earth adornment for it that We may test them [as to] which of them is best in deed.