Quran 25:67 from Surah Al-Furqaan on Divine Marvels.
وَٱلَّذِينَ إِذَآ أَنفَقُواْ لَمۡ يُسۡرِفُواْ وَلَمۡ يَقۡتُرُواْ وَكَانَ بَيۡنَ ذَٰلِكَ قَوَامٗا
English translation: And those who when they spend (are) not extravagant (are) not extravagant and are not stingy and are not stingy but are between that moderate
Transliteration: wa-alladhina idha anfaqu lam yus'rifu walam yaqturu wakana bayna dhalika qawaman