Read and reflect on verse 2623 from Surah Al-Hajj: so that they might experience much that shall be of benefit to them, and that they might extol the name of God on the days appointed [for sacrifice], ...
لِيَشْهَدُوا مَنَافِعَ لَهُمْ وَيَذْكُرُوا اسْمَ اللَّهِ فِي أَيَّامٍ مَعْلُومَاتٍ عَلَىٰ مَا رَزَقَهُمْ مِنْ بَهِيمَةِ الْأَنْعَامِ ۖ فَكُلُوا مِنْهَا وَأَطْعِمُوا الْبَائِسَ الْفَقِيرَ
so that they might experience much that shall be of benefit to them, and that they might extol the name of God on the days appointed [for sacrifice], over whatever heads of cattle He may have provided for them [to this end]: eat, then, thereof, and feed the unfortunate poor.