The Quran

أَلَم تَرَ أَنَّ اللَّهَ يَعلَمُ ما فِي السَّماواتِ وَما فِي الأَرضِ ۖ ما يَكونُ مِن نَجوىٰ ثَلاثَةٍ إِلّا هُوَ رابِعُهُم وَلا خَمسَةٍ إِلّا هُوَ سادِسُهُم وَلا أَدنىٰ مِن ذٰلِكَ وَلا أَكثَرَ إِلّا هُوَ مَعَهُم أَينَ ما كانوا ۖ ثُمَّ يُنَبِّئُهُم بِما عَمِلوا يَومَ القِيامَةِ ۚ إِنَّ اللَّهَ بِكُلِّ شَيءٍ عَليمٌ

Aisha Bewley

Do you not see that Allah knows what is in the heavens and on the earth? Three men cannot confer together secretly without Him being the fourth of them, or five without Him being the sixth of them, or fewer than that or more without Him being with them wherever they are. Then He will inform them on the Day of Rising of what they did. Allah has knowledge of all things.