Quran 2:149 Al-Baqarah, ayah 149 of 286

وَمِنْ حَيْثُ خَرَجْتَ فَوَلِّ وَجْهَكَ شَطْرَ ٱلْمَسْجِدِ ٱلْحَرَامِ ۖ وَإِنَّهُۥ لَلْحَقُّ مِن رَّبِّكَ ۗ وَمَا ٱللَّهُ بِغَـٰفِلٍ عَمَّا تَعْمَلُونَ ۝١٤٩

2:149 And whencesoever thou comest forth (for prayer, O Muhammad) turn thy face toward the Inviolable Place of Worship. Lo! it is the Truth from thy Lord. Allah is not unaware of what ye do.