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.
ahmad:12725Ḥajjāj > Shuʿbah > Hishām b. Zayd b. Anas from his grandfather Anas b. Mālik

[Machine] I entered upon the Messenger of Allah ﷺ while he was slaughtering a sheep. Hisham said, "I believe he said in its ear." Then he said something else in its ear, but I am not sure.  

أحمد:١٢٧٢٥حَدَّثَنَا حَجَّاجٌ قَالَ شُعْبَةُ أَخْبَرَنَاهُ عَنْ هِشَامِ بْنِ زَيْدِ بْنِ أَنَسٍ عَنْ جَدِّهِ أَنَسِ بْنِ مَالِكٍ قَالَ

دَخَلْتُ عَلَى رَسُولِ اللهِ ﷺ وَهُوَ يَسِمُ غَنَمًا قَالَ هِشَامٌ أَحْسَبُهُ قَالَ فِي آذَانِهَا قَالَ ثُمَّ قَالَبَعْدُ فِي آذَانِهَا وَلَمْ يَشُكَّ