Al-Hajj 22:28

لِّيَشۡهَدُواْ مَنَٰفِعَ لَهُمۡ وَيَذۡكُرُواْ ٱسۡمَ ٱللَّهِ فِيٓ أَيَّامٖ مَّعۡلُومَٰتٍ عَلَىٰ مَا رَزَقَهُم مِّنۢ بَهِيمَةِ ٱلۡأَنۡعَٰمِۖ فَكُلُواْ مِنۡهَا وَأَطۡعِمُواْ ٱلۡبَآئِسَ ٱلۡفَقِيرَ 28

That they may witness benefits for themselves and mention the name of Allah on known days over what He has provided for them of [sacrificial] animals. So eat of them and feed the miserable and poor