Al-Bahira was an animal whose milk was spared for the idols and other dieties, and so nobody was allowed to milk it. As-Saiba was an animal which they (i.e infidels) used to set free in the names of their gods so that it would not be used for carrying anything. Abu Huraira said, "The Prophet ﷺ said, 'I saw ʿAmr bin 'Amir bin Luhai Al-Khuzaʿi dragging his intestines in the (Hell) Fire, for he was the first man who started the custom of releasing animals (for the sake of false gods).' "  

الْبَحِيرَةُ الَّتِي يُمْنَعُ دَرُّهَا لِلطَّوَاغِيتِ وَلاَ يَحْلُبُهَا أَحَدٌ مِنَ النَّاسِ وَالسَّائِبَةُ الَّتِي كَانُوا يُسَيِّبُونَهَا لآلِهَتِهِمْ فَلاَ يُحْمَلُ عَلَيْهَا شَىْءٌ قَالَ وَقَالَ أَبُو هُرَيْرَةَ قَالَ النَّبِيُّ ﷺ رَأَيْتُ عَمْرَو بْنَ عَامِرِ بْنِ لُحَىٍّ الْخُزَاعِيَّ يَجُرُّ قُصْبَهُ فِي النَّارِ وَكَانَ أَوَّلَ مَنْ سَيَّبَ السَّوَائِبَ