Ma'mar (Allah be pleased with him) reported Messenger of Allah 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 ﷺ " مَنِ احْتَكَرَ فَهُوَ خَاطِئٌ " . فَقِيلَ لِسَعِيدٍ فَإِنَّكَ تَحْتَكِرُ قَالَ سَعِيدٌ إِنَّ مَعْمَرًا الَّذِي كَانَ يُحَدِّثُ هَذَا الْحَدِيثَ كَانَ يَحْتَكِرُ .