Arabic (Original)
أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ أَخْبَرَنِي أَبُو الْقَاسِمِ عَبْدُ الرَّحْمَنِ بْنُ أَحْمَدَ الْحِمْيَرِيُّ ثنا الْحَسَنُ بْنُ الْحُسَيْنِ بْنِ مَنْصُورٍ ثنا أَبُو أَحْمَدَ مُحَمَّدُ بْنُ عَبْدِ الْوَهَّابِ قَالَ سَمِعْتُ أَبِي يَقُولُ سَأَلَ أَبُو يُوسُفَ مَالِكًا عِنْدَ أَمِيرِ الْمُؤْمِنْينَ عَنِ الصَّاعِ كَمْ هُوَ رِطْلًا؟ قَالَ السُّنَّةُ عِنْدَنَا أَنَّ الصَّاعَ لَا يُرْطَلُ فَفَحَمَهُ قَالَ أَبُو أَحْمَدَ سَمِعْتُ الْحُسَيْنَ بْنَ الْوَلِيدِ يَقُولُ قَالَ أَبُو يُوسُفَ فَقَدِمْتُ الْمَدِينَةَ فَجَمَعْنَا أَبْنَاءَ أَصْحَابِ رَسُولِ اللهِ ﷺ وَدَعَوْتُ بِصَاعَاتِهِمْ فَكُلٌّ حَدَّثَنِي عَنْ آبَائِهِمْ عَنْ رَسُولِ اللهِ ﷺ أَنَّ هَذَا صَاعُهُ فَقَدَّرْتُهَا فَوَجَدْتُهَا مُسْتَوِيَةً فَتَرَكْتُ قَوْلَ أَبِي حَنِيفَةَ وَرَجَعْتُ إِلَى هَذَا
English Translation
And Abu Abdullah al-Hafiz informed us... Abu Yusuf asked Malik in the presence of the Caliph about the sa' - how many ratls is it? He said: 'The Sunnah with us is that the sa' is not weighed in ratls.' And that silenced him. Abu Ahmad said: I heard al-Husayn ibn al-Walid say that Abu Yusuf said: When I came to Madinah, we gathered the descendants of the Companions of the Messenger of Allah (peace be upon him) and called for their sa' measures, and each of them told me from their fathers from the Messenger of Allah (peace be upon him) that this was his sa'. I measured them and found them uniform. So I abandoned the view of Abu Hanifah and adopted this.