[Machine] The Prophet ﷺ prohibited eating the flesh and drinking the milk of the sacrificial animals (for Hajj or Udhiyah) and people riding on them, until they are grazed for forty nights.
«نَهَى رَسُولُ اللَّهِ ﷺ عَنِ الْجَلَّالَةِ أَنْ يُؤْكَلَ لَحْمُهَا وَيُشْرَبَ لَبَنُهَا وَلَا يُحْمَلَ عَلَيْهَا الْأَدَمُ وَلَا يَرْكَبَهَا النَّاسُ حَتَّى تُعْلَفَ أَرْبَعِينَ لَيْلَةً»