Surah Al-Hadid 57:18

إِنَّ ٱلْمُصَّدِّقِينَ وَٱلْمُصَّدِّقَـٰتِ وَأَقْرَضُوا۟ ٱللَّهَ قَرْضًا حَسَنًا يُضَـٰعَفُ لَهُمْ وَلَهُمْ أَجْرٌ كَرِيمٌ

Indeed, the men who practice charity and the women who practice charity and [they who] have loaned Allāh a goodly loan - it will be multiplied for them, and they will have a noble reward.

Translation: Saheeh International

Tafsir

Indeed men who give voluntary alms al-mussaddiqīna derives from the infinitive al-tasadduq ‘to give voluntary alms’; the tā’ of the original mutasaddiqīna has been assimilated with the sād and women who give voluntary alms a variant reading for both has the softened form with a single sād musaddiqīna and musaddiqāti …

Excerpt from Tafsir al-Jalalayn, commentary on 57:18, via Quran.com. The reader has the full commentary and 9 more tafsirs.