Mishkat al-Masabih 9 Supplications كتاب الدعوات 59

وَعَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: ” إِنَّ اللَّهَ تَعَالَى يَقُولُ: أَنَا مَعَ عَبْدِي إِذَا ذَكَرَنِي وتحركت بِي شفتاه ” . رَوَاهُ البُخَارِيّ

Abu Huraira reported God’s messenger as stating that God says, “I am with my servant when he remembers me and his lips move making mention of me.” Bukhari transmitted it.