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.

58:7
أَلَمْ تَرَى أَنَّ اللَّهَ يَعْلَمُ مَا فِي السَّمَاوَاتِ وَمَا فِي الأَرْضِ مَا يَكُونُ مِنْ نَجْوَى ثَلاَثَة ٍ إِلاَّ هُوَ رَابِعُهُمْ وَلاَ خَمْسَة ٍ إِلاَّ هُوَ سَادِسُهُمْ وَلاَ أَدْنَى مِنْ ذَلِكَ وَلاَ أَكْثَرَ إِلاَّ هُوَ مَعَهُمْ أَيْنَ مَا كَانُوا ثُمَّ يُنَبِّئُهُمْ بِمَا عَمِلُوا يَوْمَ الْقِيَامَةِ إِنَّ اللَّهَ بِكُلِّ شَيْءٍ عَلِيم ٌ
'Alam Tará 'Anna Allāha Ya`lamu Mā Fī As-Samāwāti Wa Mā Fī Al-'ArĐi Mā Yakūnu Min Najwá Thalāthatin 'Illā Huwa Rābi`uhum Wa Lā Khamsatin 'Illā Huwa Sādisuhum Wa Lā 'Adná Min Dhālika Wa Lā 'Akthara 'Illā Huwa Ma`ahum 'Ayna Mā Kānū Thumma Yunabbi'uhum Bimā `Amilū Yawma Al-Qiyāmati 'Inna Allāha Bikulli Shay'in `Alīmun 

Do you not realize that God knows everything in the heavens and everything on the earth? No three people can meet secretly without Him being their fourth, nor five without Him being the sixth, nor less than that, nor more, without Him being there with them wherever they may be. Then, on the Day of Resurrection, He will inform them of everything they had done. God is fully aware of all things.