Ma`mar (Allah be pleased with him) reported Allah’s Messenger (ﷺ) as saying:
He who hoards is a sinner. It was said to Sa`id (b. al-Musayyib): You also hoard. Sa`id said: Ma`mar who narrated this hadith also hoarded.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ بْنِ قَعْنَبٍ، حَدَّثَنَا سُلَيْمَانُ، – يَعْنِي ابْنَ بِلاَلٍ – عَنْ يَحْيَى، – وَهُوَ ابْنُ سَعِيدٍ – قَالَ كَانَ سَعِيدُ بْنُ الْمُسَيَّبِ يُحَدِّثُ أَنَّ مَعْمَرًا، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم “ مَنِ احْتَكَرَ فَهُوَ خَاطِئٌ ” . فَقِيلَ لِسَعِيدٍ فَإِنَّكَ تَحْتَكِرُ قَالَ سَعِيدٌ إِنَّ مَعْمَرًا الَّذِي كَانَ يُحَدِّثُ هَذَا الْحَدِيثَ كَانَ يَحْتَكِرُ .
Reference : Sahih Muslim 1605