Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:19511Abū ʿAlī al-Rūdhbārī > Abū Bakr b. Maḥmawayh al-ʿAskarī > Jaʿfar b. Muḥammad al-Qalānisī > Ādam b. Abū Iyās > Shuʿbah > Ḥumayd al-Ṭawīl > Anas b. Mālik

[Machine] I have heard Anas bin Malik narrate that the Messenger of Allah ﷺ once called a young boy and measured some grain for him, either a sa' (measurement unit) or two sa's, or a mound or two mounds. The Messenger spoke to him and reduced the tax he owed.  

البيهقي:١٩٥١١وَأَخْبَرَنَا أَبُو عَلِيٍّ الرُّوذْبَارِيُّ أنبأ أَبُو بَكْرِ بْنُ مَحْمَوَيْهِ الْعَسْكَرِيُّ ثنا جَعْفَرُ بْنُ مُحَمَّدٍ الْقَلَانِسِيُّ ثنا آدَمُ بْنُ أَبِي إِيَاسٍ ثنا شُعْبَةُ عَنْ حُمَيْدٍ الطَّوِيلِ قَالَ

سَمِعْتُ أَنَسَ بْنَ مَالِكٍ ؓ يَقُولُ دَعَا رَسُولُ اللهِ ﷺ غُلَامًا فَحَجَمَهُ وَأَمَرَ لَهُ بِصَاعٍ أَوْ صَاعَيْنِ أَوْ مُدٍّ أَوْ مُدَّيْنِ وَكَلَّمَ فِيهِ فَخَفَّفَ مِنْ ضَرِيبَتِهِ  

رَوَاهُ الْبُخَارِيُّ فِي الصَّحِيحِ عَنْ آدَمَ وَأَخْرَجَهُ مُسْلِمٌ مِنْ وَجْهٍ آخَرَ عَنْ شُعْبَةَ

See similar narrations below:

Collected by Bukhārī, Muslim
bukhari:2281Ādam > Shuʿbah > Ḥumayd al-Ṭawīl > Anas b. Mālik

The Prophet ﷺ sent for a slave who had the profession of cupping, and he cupped him. The Prophet ﷺ ordered that he be paid one or two Sas, or one or two Mudds of foodstuff, and appealed to his masters to reduce his taxes:  

البخاري:٢٢٨١حَدَّثَنَا آدَمُ حَدَّثَنَا شُعْبَةُ عَنْ حُمَيْدٍ الطَّوِيلِ عَنْ أَنَسِ بْنِ مَالِكٍ ؓ قَالَ

دَعَا النَّبِيُّ ﷺ غُلاَمًا حَجَّامًا فَحَجَمَهُ وَأَمَرَ لَهُ بِصَاعٍ أَوْ صَاعَيْنِ أَوْ مُدٍّ أَوْ مُدَّيْنِ وَكَلَّمَ فِيهِ فَخُفِّفَ مِنْ ضَرِيبَتِهِ  

muslim:1577cAḥmad b. al-Ḥasan b. Khirāsh > Shabābah > Shuʿbah > Ḥumayd > Anas

Allah's Apostle ﷺ called for young cupper belonging to us. He capped him and he (the Holy Prophet) commanded that he should be paid one sa' or one mudd or two mudds (of wheat). It was said (that charges were high) and a reduction was made in the charges.  

مسلم:١٥٧٧cحَدَّثَنَا أَحْمَدُ بْنُ الْحَسَنِ بْنِ خِرَاشٍ حَدَّثَنَا شَبَابَةُ حَدَّثَنَا شُعْبَةُ عَنْ حُمَيْدٍ قَالَ

سَمِعْتُ أَنَسًا يَقُولُ دَعَا النَّبِيُّ ﷺ غُلاَمًا لَنَا حَجَّامًا فَحَجَمَهُ فَأَمَرَ لَهُ بِصَاعٍ أَوْ مُدٍّ أَوْ مُدَّيْنِ وَكَلَّمَ فِيهِ فَخُفِّفَ عَنْ ضَرِيبَتِهِ