The Prophet ﷺ used to sell the dates of the garden of Bani An-Nadir and store for his family so much food as would cover their needs for a whole year.  

سَمِعْتَ فِي الرَّجُلِ يَجْمَعُ لأَهْلِهِ قُوتَ سَنَتِهِمْ أَوْ بَعْضِ السَّنَةِ قَالَ مَعْمَرٌ فَلَمْ يَحْضُرْنِي ثُمَّ ذَكَرْتُ حَدِيثًا حَدَّثَنَاهُ ابْنُ شِهَابٍ الزُّهْرِيُّ عَنْ مَالِكِ بْنِ أَوْسٍ عَنْ عُمَرَ ؓ أَنَّ النَّبِيَّ ﷺ كَانَ يَبِيعُ نَخْلَ بَنِي النَّضِيرِ وَيَحْبِسُ لأَهْلِهِ قُوتَ سَنَتِهِمْ  

Once I set out to visit ʿUmar (bin Al-Khattab). (While I was sitting there with him his gate-keeper, Yarfa, came and said, "Uthman ʿAbdurRahman (bin ʿAuf), Az-Zubair and Saʿd (bin Abi Waqqas) are seeking permission (to meet you)." ʿUmar said, "Yes. So he admitted them and they entered, greeted, and sat down. After a short while Yarfa came again and said to ʿUmar 'Shall I admit ʿAli and ʿAbbas?" ʿUmar said, "Yes." He admitted them and when they entered, they greeted and sat down. ʿAbbas said, "O Chief of the Believers! Judge between me and this (ʿAli)." The group, ʿUthman and his companions Saʿd, 'O Chief of the Believers! Judge between them and relieve one from the other." ʿUmar said. Wait! I beseech you by Allah, by Whose permission both the Heaven and the Earth stand fast ! Do you know that Messenger of Allah ﷺ said. 'We (Apostles) do not bequeath anything to our heirs, but whatever we leave is to be given in charity.' And by that Messenger of Allah ﷺs meant himself?" The group said, "He did say so." ʿUmar then turned towards 'All and ʿAbbas and said. "I beseech you both by Allah, do you know that Messenger of Allah ﷺ said that?" They said, 'Yes " ʿUmar said, "Now, let me talk to you about this matter. Allah favored His Apostle with something of this property (war booty) which He did not give to anybody else. And Allah said:-- 'And what Allah has bestowed on His Apostle (as Fai Booty) from them for which you made no expedition with either cavalry or camelry . . . Allah is Able to do all things.' (59.6) So this property was especially granted to Messenger of Allah ﷺ. But by Allah he neither withheld it from you, nor did he keep it for himself and deprive you of it, but he gave it all to you and distributed it among you till only this remained out of it. And out of this property Messenger of Allah ﷺ used to provide his family with their yearly needs, and whatever remained, he would spend where Allah's Property (the revenues of Zakat) used to be spent. Messenger of Allah ﷺ kept on acting like this throughout his lifetime. Now I beseech you by Allah, do you know that?" They said, "Yes." Then ʿUmar said to ʿAli and ʿAbbas, "I beseech you by Allah, do you both know that?" They said, "Yes." ʿUmar added, "When Allah had taken His Apostle unto Him, Abu Bakr said, 'I am the successor of Messenger of Allah ﷺ. So he took charge of that property and did with it the same what Messenger of Allah ﷺ used to do, and both of you knew all about it then." Then ʿUmar turned towards ʿAli and ʿAbbas and said, "You both claim that Abu- Bakr was so-and-so! But Allah knows that he was honest, sincere, pious and right (in that matter). Then Allah caused Abu Bakr to die, and I said, 'I am the successor of Messenger of Allah ﷺ and Abu Bakr.' So I kept this property in my possession for the first two years of my rule, and I used to do the same with it as Messenger of Allah ﷺ and Abu Bakr used to do. Later both of you (ʿAli and ʿAbbas) came to me with the same claim and the same problem. (O ʿAbbas!) You came to me demanding your share from (the inheritance of) the son of your brother, and he (ʿAli) came to me demanding his wives share from (the inheritance of) her father. So I said to you, 'If you wish I will hand over this property to you, on condition that you both promise me before Allah that you will manage it in the same way as Messenger of Allah ﷺ and Abu Bakr did, and as I have done since the beginning of my rule; otherwise you should not speak to me about it.' So you both said, 'Hand over this property to us on this condition.' And on this condition I handed it over to you. I beseech you by Allah, did I hand it over to them on that condition?" The group said, "Yes." ʿUmar then faced ʿAli and ʿAbbas and said, "I beseech you both by Allah, did I hand it over to you both on that condition?" They both said, "Yes." ʿUmar added, "Do you want me now to give a decision other than that? By Him with Whose permission (order) both the Heaven and the Earth stand fast, I will never give any decision other than that till the Hour is established! But if you are unable to manage it (that property), then return it to me and I will be sufficient for it on your behalf . "  

مَالِكٌ انْطَلَقْتُ حَتَّى أَدْخُلَ عَلَى عُمَرَ إِذْ أَتَاهُ حَاجِبُهُ يَرْفَا فَقَالَ هَلْ لَكَ فِي عُثْمَانَ وَعَبْدِ الرَّحْمَنِ وَالزُّبَيْرِ وَسَعْدٍ يَسْتَأْذِنُونَ قَالَ نَعَمْ فَأَذِنَ لَهُمْ قَالَ فَدَخَلُوا وَسَلَّمُوا فَجَلَسُوا ثُمَّ لَبِثَ يَرْفَا قَلِيلاً فَقَالَ لِعُمَرَ هَلْ لَكَ فِي عَلِيٍّ وَعَبَّاسٍ قَالَ نَعَمْ فَأَذِنَ لَهُمَا فَلَمَّا دَخَلاَ سَلَّمَا وَجَلَسَا فَقَالَ عَبَّاسٌ يَا أَمِيرَ الْمُؤْمِنِينَ اقْضِ بَيْنِي وَبَيْنَ هَذَا فَقَالَ الرَّهْطُ عُثْمَانُ وَأَصْحَابُهُ يَا أَمِيرَ الْمُؤْمِنِينَ اقْضِ بَيْنَهُمَا وَأَرِحْ أَحَدَهُمَا مِنَ الآخَرِ فَقَالَ عُمَرُ اتَّئِدُوا أَنْشُدُكُمْ بِاللَّهِ الَّذِي بِهِ تَقُومُ السَّمَاءُ وَالأَرْضُ هَلْ تَعْلَمُونَ أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ نُورَثُ مَا تَرَكْنَا صَدَقَةٌ يُرِيدُ رَسُولُ اللَّهِ ﷺ نَفْسَهُ قَالَ الرَّهْطُ قَدْ قَالَ ذَلِكَ فَأَقْبَلَ عُمَرُ عَلَى عَلِيٍّ وَعَبَّاسٍ فَقَالَ أَنْشُدُكُمَا بِاللَّهِ هَلْ تَعْلَمَانِ أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ ذَلِكَ قَالاَ قَدْ قَالَ ذَلِكَ قَالَ عُمَرُ فَإِنِّي أُحَدِّثُكُمْ عَنْ هَذَا الأَمْرِ إِنَّ اللَّهَ كَانَ خَصَّ رَسُولَهُ ﷺ فِي هَذَا الْمَالِ بِشَىْءٍ لَمْ يُعْطِهِ أَحَدًا غَيْرَهُ قَالَ اللَّهُ {مَا أَفَاءَ اللَّهُ عَلَى رَسُولِهِ مِنْهُمْ فَمَا أَوْجَفْتُمْ عَلَيْهِ مِنْ خَيْلٍ} إِلَى قَوْلِهِ {قَدِيرٌ} فَكَانَتْ هَذِهِ خَالِصَةً لِرَسُولِ اللَّهِ ﷺ وَاللَّهِ مَا احْتَازَهَا دُونَكُمْ وَلاَ اسْتَأْثَرَ بِهَا عَلَيْكُمْ لَقَدْ أَعْطَاكُمُوهَا وَبَثَّهَا فِيكُمْ حَتَّى بَقِيَ مِنْهَا هَذَا الْمَالُ فَكَانَ رَسُولُ اللَّهِ ﷺ يُنْفِقُ عَلَى أَهْلِهِ نَفَقَةَ سَنَتِهِمْ مِنْ هَذَا الْمَالِ ثُمَّ يَأْخُذُ مَا بَقِيَ فَيَجْعَلُهُ مَجْعَلَ مَالِ اللَّهِ فَعَمِلَ بِذَلِكَ رَسُولُ اللَّهِ ﷺ حَيَاتَهُ أَنْشُدُكُمْ بِاللَّهِ هَلْ تَعْلَمُونَ ذَلِكَ قَالُوا نَعَمْ قَالَ لِعَلِيٍّ وَعَبَّاسٍ أَنْشُدُكُمَا بِاللَّهِ هَلْ تَعْلَمَانِ ذَلِكَ قَالاَ نَعَمْ ثُمَّ تَوَفَّى اللَّهُ نَبِيَّهُ ﷺ فَقَالَ أَبُو بَكْرٍ أَنَا وَلِيُّ رَسُولِ اللَّهِ ﷺ فَقَبَضَهَا أَبُو بَكْرٍ يَعْمَلُ فِيهَا بِمَا عَمِلَ بِهِ فِيهَا رَسُولُ اللَّهِ ﷺ وَأَنْتُمَا حِينَئِذٍ وَأَقْبَلَ عَلَى عَلِيٍّ وَعَبَّاسٍ تَزْعُمَانِ أَنَّ أَبَا بَكْرٍ كَذَا وَكَذَا وَاللَّهُ يَعْلَمُ أَنَّهُ فِيهَا صَادِقٌ بَارٌّ رَاشِدٌ تَابِعٌ لِلْحَقِّ ثُمَّ تَوَفَّى اللَّهُ أَبَا بَكْرٍ فَقُلْتُ أَنَا وَلِيُّ رَسُولِ اللَّهِ ﷺ وَأَبِي بَكْرٍ فَقَبَضْتُهَا سَنَتَيْنِ أَعْمَلُ فِيهَا بِمَا عَمِلَ رَسُولُ اللَّهِ ﷺ وَأَبُو بَكْرٍ ثُمَّ جِئْتُمَانِي وَكَلِمَتُكُمَا وَاحِدَةٌ وَأَمْرُكُمَا جَمِيعٌ جِئْتَنِي تَسْأَلُنِي نَصِيبَكَ مِنِ ابْنِ أَخِيكَ وَأَتَى هَذَا يَسْأَلُنِي نَصِيبَ امْرَأَتِهِ مِنْ أَبِيهَا فَقُلْتُ إِنْ شِئْتُمَا دَفَعْتُهُ إِلَيْكُمَا عَلَى أَنَّ عَلَيْكُمَا عَهْدَ اللَّهِ وَمِيثَاقَهُ لَتَعْمَلاَنِ فِيهَا بِمَا عَمِلَ بِهِ رَسُولُ اللَّهِ ﷺ وَبِمَا عَمِلَ بِهِ فِيهَا أَبُو بَكْرٍ وَبِمَا عَمِلْتُ بِهِ فِيهَا مُنْذُ وُلِّيتُهَا وَإِلاَّ فَلاَ تُكَلِّمَانِي فِيهَا فَقُلْتُمَا ادْفَعْهَا إِلَيْنَا بِذَلِكَ فَدَفَعْتُهَا إِلَيْكُمَا بِذَلِكَ أَنْشُدُكُمْ بِاللَّهِ هَلْ دَفَعْتُهَا إِلَيْهِمَا بِذَلِكَ فَقَالَ الرَّهْطُ نَعَمْ قَالَ فَأَقْبَلَ عَلَى عَلِيٍّ وَعَبَّاسٍ فَقَالَ أَنْشُدُكُمَا بِاللَّهِ هَلْ دَفَعْتُهَا إِلَيْكُمَا بِذَلِكَ قَالاَ نَعَمْ قَالَ أَفَتَلْتَمِسَانِ مِنِّي قَضَاءً غَيْرَ ذَلِكَ فَوَالَّذِي بِإِذْنِهِ تَقُومُ السَّمَاءُ وَالأَرْضُ لاَ أَقْضِي فِيهَا قَضَاءً غَيْرَ ذَلِكَ حَتَّى تَقُومَ السَّاعَةُ فَإِنْ عَجَزْتُمَا عَنْهَا فَادْفَعَاهَا فَأَنَا أَكْفِيكُمَاهَا