[Machine] Ibn Abbas asked the Messenger of Allah, peace be upon him, "In how many days were the heavens and the earth created?" He replied, "Allah created the first day, and the earth was created on Sunday and Monday. The mountains were created, the rivers were split, and fruits were planted on the earth on Tuesday. The sustenance of every land was ordained on Tuesday and Wednesday. Then, Allah rose above the heavens while they were still smoke, and He said to them and to the earth, 'Come willingly or unwillingly.' They both said, 'We come willingly.' He completed them in seven heavens in two days, and He commanded each heaven in its affairs on Thursday and Friday. The last creation was in the latter part of the last hour of Friday. When Saturday came, there was no creation on it. The Jews said about it what they said, so Allah, the Mighty and Majestic, revealed to refute their claim, 'Indeed, We created the heavens and the earth and what is between them in six days, and there touched Us no weariness.'" (Surah Qaf, 50:38)  

ابْنُ عَبَّاسٍ سُئِلَ رَسُولُ اللَّهِ ﷺ فِي كَمْ خُلِقَتِ السَّمَاوَاتُ وَالْأَرْضً؟ قَالَ خَلَقَ اللَّهُ أَوَّلَ الْأَيَّامِ الْأَحَدَ وَخُلِقَتِ الْأَرْضُ فِي يَوْمِ الْأَحَدِ وَيَوْمَ الِاثْنَيْنِ وَخُلِقَتِ الْجِبَالُ وَشُقَّتِ الْأَنْهَارُ وَغُرِسَ فِي الْأَرْضِ الثِّمَارُ وَقُدِّرَ فِي كُلِّ أَرْضٍ قُوتُهَا يَوْمَ الثُّلَاثَاءِ وَيَوْمَ الْأَرْبِعَاءِ ثُمَّ اسْتَوَى إِلَى السَّمَاءِ وَهِيَ دُخَانٌ فَقَالَ لَهَا وَلِلْأَرْضِ {ائْتِيَا طَوْعًا أَوْ كَرْهًا قَالَتَا أَتَيْنَا طَائِعِينَ} [فصلت 11] فَقَضَاهُنَّ سَبْعَ سَمَاوَاتٍ فِي يَوْمَيْنِ وَأَوْحَى فِي كُلِّ سَمَاءٍ أَمْرَهَا فِي يَوْمِ الْخَمِيسِ وَيَوْمِ الْجُمُعَةِ وَكَانَ آخِرُ الْخَلْقِ فِي آخِرِ السَّاعَاتِ يَوْمَ الْجُمُعَةِ فَلَمَّا كَانَ يَوْمُ السَّبْتِ لَمْ يَكُنْ فِيهِ خَلْقٌ فَقَالَتِ الْيَهُودُ فِيهِ مَا قَالَتْ فَأَنْزَلَ اللَّهُ ﷻ تَكْذِيبَهَا {وَلَقَدْ خَلَقْنَا السَّمَوَاتِ وَالْأَرْضَ وَمَا بَيْنَهُمَا فِي سِتَّةِ أَيَّامٍ وَمَا مَسَّنَا مِنْ لُغُوبٍ}