Ibn Harmalah said: Umm Habib gave us a sa' and told us narration from the nephew of Safiyyah on the authority of Safiyyah that it was the sa' of the Prophet ﷺ. Anas ibn Ayyad said: I tested it and found its capacity two and half mudd according to the mudd of Hisham.  

عَنْ أُمِّ حَبِيبٍ بِنْتِ ذُؤَيْبِ بْنِ قَيْسٍ الْمُزَنِيَّةِ وَكَانَتْ تَحْتَ رَجُلٍ مِنْهُمْ مِنْ أَسْلَمَ ثُمَّ كَانَتْ تَحْتَ ابْنِ أَخٍ لِصَفِيَّةَ زَوْجِ النَّبِيِّ ﷺ قَالَ ابْنُ حَرْمَلَةَ فَوَهَبَتْ لَنَا أُمُّ حَبِيبٍ صَاعًا حَدَّثَتْنَا عَنِ ابْنِ أَخِي صَفِيَّةَ عَنْ صَفِيَّةَ أَنَّهُ صَاعُ النَّبِيِّ ﷺ قَالَ أَنَسٌ فَجَرَّبْتُهُ أَوْ قَالَ فَحَزَرْتُهُ فَوَجَدْتُهُ مُدَّيْنِ وَنِصْفًا بِمُدِّ هِشَامٍ  

We had a makkuk which was called Makkuk Khalid. Its capacity was two measurements according to the measurements of Harun. The narrator said: The sa' of Khalid was the sa' of Hisham b. 'Abd al-Malik.  

يُقَالُ لَهُ مَكُّوكُ خَالِدٍ وَكَانَ كَيْلَجَتَيْنِ بِكَيْلَجَةِ هَارُونَ قَالَ مُحَمَّدٌ صَاعُ خَالِدٍ صَاعُ هِشَامٍ يَعْنِي ابْنَ عَبْدِ الْمَلِكِ  

When Khalid al-Qasri was made ruler (of Hijaz and Kufah), he doubled the measure of sa'. The sa' then measured sixteen rotls. Abu Dawud said: Muhammad b. Muhammad b. Khattab was slain by Negroes in confinement. He said while signing with his hand: "in this way". Abu Dawud extended his hand and turned his palms towards earth and said: I saw him in the dream and asked him: How did Allah deal with you ? He replied: He admitted to Paradise. I said: Your detention did not harm you.  

لَمَّا وُلِّيَ خَالِدٌ الْقَسْرِيُّ أَضْعَفَ الصَّاعَ فَصَارَ الصَّاعُ سِتَّةَ عَشَرَ رَطْلاً