6:143
ثَمَانِيَةَ أَزْوَاج ٍ مِنَ الضَّأْنِ اثْنَيْنِ وَمِنَ الْمَعْزِ اثْنَيْنِ قُلْ أَالذَّكَرَيْنِ حَرَّمَ أَمِ الأُنْثَيَيْنِ أَمَّا اشْتَمَلَتْ عَلَيْهِ أَرْحَامُ الأُنثَيَيْنِ نَبِّئُونِي بِعِلْم ٍ إِنْ كُنتُمْ صَادِقِينَ
Thamāniyata 'Azwājin Mina AĐ-Đa'ni Athnayni Wa Mina Al-Ma`zi Athnayni Qul 'Āldhdhakarayni Ĥarrama 'Ami Al-'Unthayayni 'Ammā Ashtamalat `Alayhi 'Arĥāmu Al-'Unthayayni Nabbi'ūnī Bi`ilmin 'In Kuntum Şādiqīna 

Eight in pairs: from the lambs two, and from the goats two. Say: "Is it the two males that He forbade or the two females, or what the wombs of the two females bore? Inform me if you are truthful!"

28:27
قَالَ إِنِّي أُرِيدُ أَنْ أُنكِحَكَ إِحْدَى ابْنَتَيَّ هَاتَيْنِ عَلَى أَنْ تَأْجُرَنِي ثَمَانِيَةَ حِجَج ٍ فَإِنْ أَتْمَمْتَ عَشْرا ً فَمِنْ عِنْدِكَ وَمَا أُرِيدُ أَنْ أَشُقَّ عَلَيْكَ سَتَجِدُنِي إِنْ شَاءَ اللَّهُ مِنَ الصَّالِحِينَ
Qāla 'Innī 'Urīdu 'An 'Unkiĥaka 'Iĥdá Abnatayya Hātayni `Alá 'An Ta'juranī Thamāniyata Ĥijajin Fa'in 'Atmamta `Ashrāan Famin `Indika Wa Mā 'Urīdu 'An 'Ashuqqa `Alayka Satajidunī 'In Shā'a Allāhu Mina Aş-Şāliĥīna 

He said: "I wish you to marry one of my two daughters, on condition that you work for me through eight pilgrimage periods; if you complete them to ten, it will be voluntary on your part. I do not wish to make this matter too difficult for you. You will find me, God willing, of the righteous."

39:6
خَلَقَكُمْ مِنْ نَفْس ٍ وَاحِدَة ٍ ثُمَّ جَعَلَ مِنْهَا زَوْجَهَا وَأَنْزَلَ لَكُمْ مِنَ الأَنعَام ثَمَانِيَةَ أَزْوَاج ٍ يَخْلُقُكُمْ فِي بُطُونِ أُمَّهَاتِكُمْ خَلْقا ً مِنْ بَعْدِ خَلْق ٍ فِي ظُلُمَات ٍ ثَلاَث ٍ ذَلِكُمُ اللَّهُ رَبُّكُمْ لَهُ الْمُلْكُ لاَ إِلَهَ إِلاَّ هُوَ فَأَنَّى تُصْرَفُونَ
Khalaqakum Min Nafsin Wāĥidatin Thumma Ja`ala Minhā Zawjahā Wa 'Anzala Lakum Mina Al-'An`ām Thamāniyata 'Azwājin Yakhluqukum Fī Buţūni 'Ummahātikum Khalqāan Min Ba`di Khalqin Fī žulumātin Thalāthin Dhalikumu Allāhu Rabbukum Lahu Al-Mulku Lā 'Ilāha 'Illā Huwa Fa'anná Tuşrafūna 

He created you from one person, then He made from it its mate. And He sent down to you eight pairs of the livestock. He creates you in the wombs of your mothers, a creation after a creation in three darknesss. Such is God your Lord. To Him belongs the sovereignty. There is no god besides Him. How is it then you deviate?

69:7
سَخَّرَهَا عَلَيْهِمْ سَبْعَ لَيَال ٍ وَثَمَانِيَةَ أَيَّامٍ حُسُوما ً فَتَرَى الْقَوْمَ فِيهَا صَرْعَى كَأَنَّهُمْ أَعْجَازُ نَخْلٍ خَاوِيَة ٍ
Sakhkharahā `Alayhim Sab`a Layālin Wa Thamāniyata 'Ayyāmin Ĥusūmāan Fatará Al-Qawma Fīhā Şar`á Ka'annahum 'A`jāzu Nakhlin Khāwiyahin 

He unleashed it upon them for seven nights and eight days, in succession. You could see the people destroyed in it, as if they are decayed palm trunks.

69:17
وَالْمَلَكُ عَلَى أَرْجَائِهَا وَيَحْمِلُ عَرْشَ رَبِّكَ فَوْقَهُمْ يَوْمَئِذ ٍ ثَمَانِيَة ٌ
Wa Al-Malaku `Alá 'Arjā'ihā Wa Yaĥmilu `Arsha Rabbika Fawqahum Yawma'idhin Thamāniyahun 

And the angels will be on its borders; and the Throne of your Lord will be carried, above them on that Day, by eight.

thamin 

18:22
سَيَقُولُونَ ثَلاَثَة ٌ رَابِعُهُمْ كَلْبُهُمْ وَيَقُولُونَ خَمْسَة ٌ سَادِسُهُمْ كَلْبُهُمْ رَجْما ً بِالْغَيْبِ وَيَقُولُونَ سَبْعَة ٌ وَثَامِنُهُمْ كَلْبُهُمْ قُلْ رَبِّي أَعْلَمُ بِعِدَّتِهِمْ مَا يَعْلَمُهُمْ إِلاَّ قَلِيل ٌ فَلاَ تُمَارِ فِيهِمْ إِلاَّ مِرَاء ً ظَاهِرا ً وَلاَ تَسْتَفْتِ فِيهِمْ مِنْهُمْ أَحَدا ً
Sayaqūlūna Thalāthatun Rābi`uhum Kalbuhum Wa Yaqūlūna Khamsatun Sādisuhum Kalbuhum Rajmāan Bil-Ghaybi Wa Yaqūlūna Sab`atun Wa Thāminuhum Kalbuhum Qul Rabbī 'A`lamu Bi`iddatihim Mā Ya`lamuhum 'Illā Qalīlun Falā Tumāri Fīhim 'Illā Mirā'an žāhirāan Wa Lā Tastafti Fīhim Minhum 'Aĥadāan 

They will say: "Three, the fourth is their dog." And they say: "Five, the sixth is their dog," guessing at what they do not know. And they say: "Seven, and the eighth is their dog." Say: "My Lord is fully aware of their number, none know them except for a few." So do not argue regarding them except with proof, and do not seek information regarding them from anyone.