إِنَّا جَعَلْنَا مَا عَلَى الْأَرْضِ زِينَةً لَّهَا لِنَبْلُوَهُمْ أَيُّهُمْ أَحْسَنُ عَمَلًا
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سورة الكهف
(18/7) Surely We have made whatever is on the earth an embellishment for it, so that We may try them as to which of them is best in deeds.
Surah Al-Kahf