عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ وَ أَحْمَدَ بْنِ مُحَمَّدٍ جَمِيعاً عَنِ ابْنِ أَبِي نَصْرٍ قَالَ سَأَلَ رَجُلٌ الرِّضَا ( عليه السلام ) عَنِ الزَّوْجِ مِنَ الْحَمَامِ يُفْرِخُ عِنْدَهُ يَتَزَوَّجُ الطَّيْرُ أُمَّهُ وَ ابْنَتَهُ قَالَ لَا بَأْسَ بِمَا كَانَ بَيْنَ الْبَهَائِمِ .
19. A number of our people have narrated from Sahl ibn Ziyad and Ahmad ibn Muhammad from all from ibn abu Nasr who has said the following: “Once a man asked al-Rida’ , about a pair of pigeons which hatched chicks with him; if a bird can mate a mother bird or daughter bird. He (the Imam) said, ‘It is not harmful with what is in animals.’” 