Hud - 11:7

وَهُوَ الَّذِي خَلَق السَّمَاوَاتِ وَالأَرْضَ فِي سِتَّةِ أَيَّامٍ وَكَانَ عَرْشُهُ عَلَى الْمَاء لِيَبْلُوَكُمْ أَيُّكُمْ أَحْسَنُ عَمَلاً وَلَئِن قُلْتَ إِنَّكُم مَّبْعُوثُونَ مِن بَعْدِ الْمَوْتِ لَيَقُولَنَّ الَّذِينَ كَفَرُواْ إِنْ هَـذَا إِلاَّ سِحْرٌ مُّبِينٌ
[11:7]
And He it is Who created the heavens and the earth in six periods-- and His dominion (extends) on the water-- that He might manifest to you, which of you is best in action, and if you say, surely you shall be raised up after death, those who disbelieve would certainly say: This is nothing but clear magic.
He it is Who created the heavens and the earth in six Days - and His Throne was over the waters - that He might try you, which of you is best in conduct. But if thou wert to say to them, "Ye shall indeed be raised up after death", the Unbelievers would be sure to say, "This is nothing but obvious sorcery!"
And He it is Who created the heavens and the earth in six Days - and His Throne was upon the water - that He might try you, which of you is best in conduct. Yet if thou (O Muhammad) sayest: Lo! ye will be raised again after death! those who disbelieve will surely say: This is naught but mere magic.