Surah Al-Baqarah, Verse 271

إِن تُبۡدُواْ ٱلصَّدَقَٰتِ فَنِعِمَّا هِيَۖ وَإِن تُخۡفُوهَا وَتُؤۡتُوهَا ٱلۡفُقَرَآءَ فَهُوَ خَيۡرٞ لَّكُمۡۚ وَيُكَفِّرُ عَنكُم مِّن سَيِّـَٔاتِكُمۡۗ وَٱللَّهُ بِمَا تَعۡمَلُونَ خَبِيرٞ٢٧١

in tub'dū l-ṣadaqāti faniʿimmā hiya wa-in tukh'fūhā watu'tūhā l-fuqarāa fahuwa khayrun lakum wayukaffiru ʿankum min sayyiātikum wal-lahu bimā taʿmalūna khabīrun

If you disclose your charitable expenditures, they are good; but if you conceal them and give them to the poor, it is better for you, and He will remove from you some of your misdeeds [thereby]. And Allāh, of what you do, is [fully] Aware.