The Messenger of Allah ﷺ as saying: No one withholds goods till their price rises but a sinner. I said to Sa'id (b. al-Musayyab): You withhold goods till their price rises. He said: Ma'mar used to withhold goods till their price rose. Abu Dawud said: I asked Ahmad (b. Hanbal): What is hoarding (hukrah) ? He replied: That on which people live. Abu Dawud said: Al-Auza'i said: A muhtakir (one who hoards) is one who withholds supply of goods in the market.  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَحْتَكِرُ إِلاَّ خَاطِئٌ فَقُلْتُ لِسَعِيدٍ فَإِنَّكَ تَحْتَكِرُ قَالَ وَمَعْمَرٌ كَانَ يَحْتَكِرُ  

From Sa'eed bin Al-Musayyab, from Ma'mar bin 'Abdullah bin Nadlah who said: "I heard the Messenger of Allah ﷺ saying: 'Hoarding is nothing but sin.' So I (Muhammad) said to Sa'eed: "O Abu Muhammad! You hoard?" He said: "And Ma'mar would hoard." It is also been reported that Sa'eed bin Musayyab would hoard oil, (camel) fodder, and the like.  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ لاَ يَحْتَكِرُ إِلاَّ خَاطِئٌ فَقُلْتُ لِسَعِيدٍ يَا أَبَا مُحَمَّدٍ إِنَّكَ تَحْتَكِرُ قَالَ وَمَعْمَرٌ قَدْ كَانَ يَحْتَكِرُ  

No one hoards but the sinner. (Using translation from Muslim 1605b)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «لَا يَحْتَكِرُ إِلَّا خَاطِئٌ» فَقُلْتُ لِسَعِيدٍ إِنَّكَ تَحْتَكِرُ قَالَ إِنَّ مَعْمَرًا كَانَ يَحْتَكِرُ  

He who hoards is a sinner. It was said to Saʿid (b. al-Musayyib): You also hoard. Saʿid said: Maʿmar who narrated this hadith also hoarded. (Using translation from Muslim 1605a)   

قَالَ رَسُولُ اللهِ ﷺ مَنِ احْتَكَرَ فَهُوَ خَاطِئٌ فَقَالَ إِنْسَانٌ لِسَعِيدٍ فَإِنَّكَ تَحْتَكِرُ فَقَالَ سَعِيدٌ مَعْمَرٌ الَّذِي كَانَ يُحَدِّثُ هَذَا الْحَدِيثَ كَانَ يَحْتَكِرُ