ENOfficial
Jabir and Hudhaifa reported God’s messenger as saying, “Every act of kindness is sadaqa.” (Bukhari and Muslim.)
Source: sunnah.com
Other translations
Arabic
وَعَنْ جَابِرٍ وَحُذَيْفَةَ قَالَا: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «كُلُّ مَعْرُوف صَدَقَة»
sunnah.com