I heard Mundhir at-Tuzi reporting Ibn Hanafiya who said, "My father sent me saying, 'Take this letter to ʿUthman for it contains the orders of the Prophet ﷺ concerning the Sadaqa.' "
أَرْسَلَنِي أَبِي خُذْ هَذَا الْكِتَابَ فَاذْهَبْ بِهِ إِلَى عُثْمَانَ فَإِنَّ فِيهِ أَمْرَ النَّبِيِّ ﷺ فِي الصَّدَقَةِ