"I asked Abu Abyub [Al-Ansari] how the slaughtering was done during the time of the Messenger of Allah ﷺ. He said: 'A man would sacrifice a sheep for himself and the people in his household. They would eat from it and feed others, until the people (later) would boast about it and it became as you see now."  

سَمِعْتُ عَطَاءَ بْنَ يَسَارٍ يَقُولُ سَأَلْتُ أَبَا أَيُّوبَ الأَنْصَارِيَّ كَيْفَ كَانَتِ الضَّحَايَا عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ فَقَالَ كَانَ الرَّجُلُ يُضَحِّي بِالشَّاةِ عَنْهُ وَعَنْ أَهْلِ بَيْتِهِ فَيَأْكُلُونَ وَيُطْعِمُونَ حَتَّى تَبَاهَى النَّاسُ فَصَارَتْ كَمَا تَرَى