'Aishah said :" The Messenger of Allah(s.a.w) died and we had a Shatr of barley. We ate from it as Allah willed, then I said to the slave girl: 'Measure it' so she measured it, and it was not long before it was gone." She said: "If we had left it alone then we could have eaten from it more than that." : "Shatr" means a small quantity of barley.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا هَنَّادٌ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ تُوُفِّيَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَعِنْدَنَا شَطْرٌ مِنْ شَعِيرٍ فَأَكَلْنَا مِنْهُ مَا شَاءَ اللَّهُ ثُمَّ قُلْتُ لِلْجَارِيَةِ كِيلِيهِ فَكَالَتْهُ فَلَمْ يَلْبَثْ أَنْ فَنِيَ . قَالَتْ فَلَوْ كُنَّا تَرَكْنَاهُ لأَكَلْنَا مِنْهُ أَكْثَرَ مِنْ ذَلِكَ . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ صَحِيحٌ . وَمَعْنَى قَوْلِهَا شَطْرٌ تَعْنِي شَيْئًا .
sunnah.com