إِذِ اللَّهُ عَزَّ وَجَلَّ قِبَلَ وَجْهِ الْمُصَلِّي مَا دَامَ فِي صَلَاتِهِ مُقْبِلًا عَلَيْهِ
Because Allah, the Mighty and Majestic, is towards the face of the one who is praying as long as the worshipper remains attentive towards Him in his prayer.