"Messenger of Allah forbade us from sacrificing an animal with a broken horn." I (the narrator) mentioned that to Sa'eed bin Al_Musayyab and he said: "Yes, m unless half or more of the horn is missing."  

سَمِعْتُ عَلِيًّا يَقُولُ نَهَى رَسُولُ اللَّهِ ﷺ أَنْ يُضَحَّى بِأَعْضَبِ الْقَرْنِ فَذَكَرْتُ ذَلِكَ لِسَعِيدِ بْنِ الْمُسَيَّبِ قَالَ نَعَمْ إِلاَّ عَضَبَ النِّصْفِ وَأَكْثَرَ مِنْ ذَلِكَ  

"The Messenger of Allah ﷺ prohibited that an animal with a A'dab (stump) horn or ear should be slaughtered as a sacrifice." Qatadah (one of the narrators) said: "So I mentioned this to Sa'eed bin Al-Musayyab and he said: 'The A'dab is that which equals or more than that.'"  

نَهَى رَسُولُ اللَّهِ ﷺ أَنْ يُضَحَّى بِأَعْضَبِ الْقَرْنِ وَالأُذُنِ قَالَ قَتَادَةُ فَذَكَرْتُ ذَلِكَ لِسَعِيدِ بْنِ الْمُسَيَّبِ فَقَالَ الْعَضْبُ مَا بَلَغَ النِّصْفَ فَمَا فَوْقَ ذَلِكَ  

I heard Jurayy bin Kulaib say: I heard ‘Ali ؓ say: The Messenger of Allah ﷺ forbade (sacrificing) an animal that had lost most of its horn or ear. Qatadah said: I asked Saʿeed bin Al-Musayyab: What does lost most of its ear mean? He said: If it has lost half or more of it.  

سَمِعْتُ عَلِيًّا يَقُولُ نَهَى رَسُولُ اللهِ ﷺ عَنْ عَضَبِ الْقَرْنِ وَالْأُذُنِ قَالَ قَتَادَةُ فَسَأَلْتُ سَعِيدَ بْنَ الْمُسَيِّبِ قَالَ قُلْتُ مَا عَضَبُ الْأُذُنِ؟ فَقَالَ إِذَا كَانَ النِّصْفَ أَوِ اكْثَرَ مِنْ ذَلِكَ  

The Messenger of Allah ﷺ forbade sacrificing an animal that had lost most of its horn or ear, Qatadah said: I mentioned that to Saʿeed bin Al-Musayyab and he said: Yes, the one that has lost half or more of that.  

أَنَّهُ سَمِعَ عَلِيًّا يَقُولُ نَهَى رَسُولُ اللهِ ﷺ أَنْ يُضَحَّى بِأَعْضَبِ الْقَرْنِ وَالْأُذُنِ قَالَ قَتَادَةُ فَذَكَرْتُ ذَلِكَ لِسَعِيدِ بْنِ الْمُسَيِّبِ فَقَالَ نَعَمْ الْعَضَبُ النِّصْفُ أَوْ أَكْثَرُ مِنْ ذَلِكَ