Do these vermin trouble you? He (Ka'b) said: Yes. The Messenger of Allah (way peace be upon him) said: Shave your head and give some quantity of food enough to feed six needy persons (faraq is equal to three sa's), or observe fast for three days or offer sacrifice of a sacrificial animal. Ibn Najih (one of the narrators) said:" Or sacrifice a goat." (Using translation from Muslim 1201e)   

أَنَّ رَسُولَ اللهِ ﷺ مَرَّ بِهِ وَهُوَ بِالْحُدَيْبِيَةِ قَبْلَ أَنْ يَدْخُلَ مَكَّةَ وَهُوَ مُحْرِمٌ وَهُوَ يُوقِدُ تَحْتَ قِدْرٍ لَهُ وَالْقَمْلُ يَتَهَافَتُ عَلَى وَجْهِهِ فَقَالَ أَتُؤْذِيكَ هَوَامُّكَ هَذِهِ قُلْتُ نَعَمْ قَالَ فَاحْلِقْ رَأْسَكَ وَأَطْعِمْ فَرَقًا بَيْنَ سِتَّةِ مَسَاكِينَ وَالْفَرَقُ ثَلَاثَةُ آصُعٍ أَوْ صُمْ ثَلَاثَةَ أَيَّامٍ أَوِ انْسُكْ نَسِيكَةً وَقَالَ ابْنُ أَبِي نَجِيحٍ أَوِ اذْبَحْ شَاةً  

[Machine] That is not guaranteed.  

لَيْسَ ذَلِكَ بِمَحْفُوظٍ  

[Machine] I heard my father say that Abu Yusuf asked Malik, in the presence of the Commander of the Believers, about the measure of a saa' in terms of ratl. He said, "According to our tradition, a saa' is not measured in ratl." So, Abu Ahmad said, "I heard Husayn ibn Walid say that Abu Yusuf said, 'I went to Madinah and brought together the children of the companions of the Messenger of Allah ﷺ , and I asked them about their saa'. Each of them told me that their fathers narrated from the Messenger of Allah ﷺ that this is his saa'. I estimated it and found it to be equal. So, I left the opinion of Abu Hanifa and returned to this."  

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  

[Machine] To open a doorway of knowledge to you, I searched for it. I went to the city and asked about the saa' (a unit of measurement). They said, "Our saa' is the saa' of the Messenger of Allah ﷺ." I asked them, "What is your evidence for that?" They said, "We will bring you evidence tomorrow." So, when the morning came, around fifty sheikhs from the descendants of the Muhajireen and the Ansar came to me, each one of them carrying a saa' under his cloak. Each one of them would inform about his father or his household that this is the saa' of the Messenger of Allah ﷺ. I looked, and it was exactly the same. He said, "So I accepted it." Then, I abandoned the statement of Abu Hanifa regarding the saa' and I adopted the statement of the people of Madinah. Al-Husayn said, "I argued from that year." Then, I met Malik bin Anas and asked him about the saa', and he said, "Our saa' is the saa' of the Messenger of Allah ﷺ." I asked him, "How many ratls is it?" He said, "The weight cannot be measured by ratls. This is it." Al-Husayn said, "Then, I met Abdullah bin Zaid bin Aslam, and he said, 'My father informed me on the authority of my grandfather that this is the saa' of Umar.'"  

أَنْ أَفْتَحَ عَلَيْكُمْ بَابًا مِنَ الْعِلْمِ هَمَّنِي تَفَحَّصْتُ عَنْهُ فَقَدِمْتُ الْمَدِينَةَ فَسَأَلْتُ عَنِ الصَّاعِ فَقَالُوا صَاعُنَا هَذَا صَاعُ رَسُولِ اللهِ ﷺ قُلْتُ لَهُمْ مَا حُجَّتُكُمْ فِي ذَلِكَ؟ فَقَالُوا نَأْتِيكَ بِالْحُجَّةِ غَدًا فَلَمَّا أَصْبَحْتُ أَتَانِي نَحْوٌ مِنْ خَمْسِينَ شَيْخًا مِنْ أَبْنَاءِ الْمُهَاجِرِينَ وَالْأَنْصَارِ مَعَ كُلِّ رَجُلٍ مِنْهُمُ الصَّاعُ تَحْتَ رِدَائِهِ كُلُّ رَجُلٍ مِنْهُمْ يُخْبِرُ عَنْ أَبِيهِ أَوْ أَهْلِ بَيْتِهِ أَنَّ هَذَا صَاعُ رَسُولِ اللهِ ﷺ فَنَظَرْتُ فَإِذَا هِيَ سَوَاءٌ قَالَ فَعَايَرْتُهُ فَإِذَا هُوَ خَمْسَةُ أَرْطَالٍ وَثُلُثٌ بِنُقْصَانٍ مَعَهُ يَسِيرٍ فَرَأَيْتُ أَمْرًا قَوِيًّا فَقَدْ تَرَكْتُ قَوْلَ أَبِي حَنِيفَةَ فِي الصَّاعِ وَأَخَذْتُ بِقَوْلِ أَهْلِ الْمَدِينَةِ قَالَ الْحُسَيْنُ فَحَجَجْتُ مِنْ عَامِي ذَلِكَ فَلَقِيتُ مَالِكَ بْنَ أَنَسٍ فَسَأَلْتُهُ عَنِ الصَّاعِ فَقَالَ صَاعُنَا هَذَا صَاعُ رَسُولِ اللهِ ﷺ فَقُلْتُ كَمْ رِطْلًا هُوَ؟ قَالَ إِنَّ الْمِكْيَالَ لَا يُرْطَلُ هُوَ هَذَا قَالَ الْحُسَيْنُ فَلَقِيتُ عَبْدَ اللهِ بْنَ زَيْدِ بْنِ أَسْلَمَ فَقَالَ حَدَّثَنِي أَبِي عَنْ جَدِّي أَنَّ هَذَا صَاعُ عُمَرَ ؓ  

[Machine] About the measure of the Prophet, ﷺ , he brought to me an old, worn-out measure and said, "This is the measure of the Prophet, ﷺ , with his own eyes." I examined it and it was five and a third pounds.  

عَنْ صَاعِ النَّبِيِّ ﷺ فَأَخْرَجَ إِلَيَّ صَاعًا عَتِيقًا بَالِيًا فَقَالَ هَذَا صَاعُ النَّبِيِّ ﷺ بِعَيْنِهِ فَعَيَّرْتُهُ فَكَانَ خَمْسَةَ أَرْطَالٍ وَثُلُثًا  

[Machine] I heard Muhammad ibn Yahya al-Dhuhli say, "I borrowed a measurement of Ismail ibn Abi Uwais, which was a sa'a (a unit of measurement) of Malik ibn Anas, and I found written on it 'the sa'a of Malik ibn Anas, which is equivalent to the sa'a of the Prophet ﷺ.' And I do not think that I only borrowed it for weighing lentils, but I found it to be five aratils and a third."  

سَمِعْتُ مُحَمَّدَ بْنَ يَحْيَى يَعْنِي الذُّهْلِيَّ يَقُولُ اسْتَعَرْتُ مِنْ إِسْمَاعِيلَ بْنِ أَبِي أُوَيْسٍ صَاعَ مَالِكِ بْنِ أَنَسٍ فَوَجَدْتُ عَلَيْهِ مَكْتُوبًا صَاعُ مَالِكِ بْنِ أَنَسٍ مُعَيَّرٌ عَلَى صَاعِ النَّبِيِّ ﷺ وَلَا أَحْسَبُنِي إِلَّا عَيَّرْتُهُ بِالْعَدَسِ فَوَجَدْتُهُ خَمْسَةَ أَرْطَالٍ وَثُلُثًا  

[Machine] O Messenger of Allah, our Sa' is smaller than other measures, and our Mud is smaller than other provisions. The Messenger of Allah ﷺ said, "O Allah, bless our Sa' and Mud, and our small and large amounts. Grant us two blessings along with the blessings (barakah) of food. O Allah, Ibrahim, Your servant and Your Khalil, called upon You for the people of Makkah, and indeed, I, Your servant and Your Messenger, call upon You for the people of Madinah with the same invocation with which Ibrahim called upon You for the people of Makkah."  

ﷺ يَا رَسُولَ اللهِ إِنَّ صَاعَنَا أَصْغَرُ الصِّيعَانِ وَمُدَّنَا أَصْغَرُ الْأَمْدَادِ فَقَالَ رَسُولُ اللهِ ﷺ اللهُمَّ بَارِكْ لَنَا فِي صَاعِنَا وَمُدِّنَا وَقَلِيلِنَا وَكَثِيرِنَا وَاجْعَلْ لَنَا مَعَ الْبَرَكَةِ بَرَكَتَيْنِ اللهُمَّ إَنَّ إِبْرَاهِيمَ عَبْدَكَ وَخَلِيلَكَ دَعَاكَ لِأَهْلِ مَكَّةَ وَإِنِّي عَبْدُكَ وَرَسُولُكَ أَدْعُوكَ لِأَهْلِ الْمَدِينَةِ بِمِثْلِ مَا دَعَاكَ بِهِ إِبْرَاهِيمُ لِأَهْلِ مَكَّةَ وَالَّذِي