17:110
قُلِ ٱدْعُ وا۟ ٱللَّهَ أَوِ ٱدْعُ وا۟ ٱل رَّحْمَٰنَ أَيًّا مَّا تَدْعُ وا۟ فَ لَ هُ ٱلْ أَسْمَآءُ ٱلْ حُسْنَىٰ وَ لَا تَجْهَرْ بِ صَلَاتِ كَ وَ لَا تُخَافِتْ بِ هَا وَ ٱبْتَغِ بَيْنَ ذَٰلِكَ سَبِيلًا
Say, "Call upon Allah or call upon the Most Merciful. Whichever [name] you call - to Him belong the best names." And do not recite [too] loudly in your prayer or [too] quietly but seek between that an [intermediate] way.