Qur'an 18:7

إِنَّا جَعَلْنَا مَا عَلَى ٱلْأَرْضِ زِينَةً لَّهَا لِنَبْلُوَهُمْ أَيُّهُمْ أَحْسَنُ عَمَلًا

“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.”

Al-Kahf 18:7 · Saheeh International