Musnad Ahmad 1312
It was narrated from Hujayyah bin `Adiyy that `Ali (رضي الله عنه) was asked about a cow and he said:
“[It may be sacrificed] on behalf of seven people.” He was asked about the cow with a broken horn and he said: “It does not matter.” He was asked about a lame animal, and he said: “If it can reach the place of sacrifice (then sacrifice it).” Then he said: “The Messenger of Allah (ﷺ) instructed us to check the eyes and ears.”
حَدَّثَنَا بَهْزُ بْنُ أَسَدٍ، حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، أَنْبَأَنَا سَلَمَةُ بْنُ كُهَيْلٍ، عَنْ حُجَيَّةَ بْنِ عَدِيٍّ، أَنَّ عَلِيًّا، رَضِيَ اللَّهُ عَنْهُ سُئِلَ عَنْ الْبَقَرَةِ فَقَالَ عَنْ سَبْعَةٍ وَسُئِلَ عَنْ الْمَكْسُورَةِ الْقَرْنِ فَقَالَ لَا بَأْسَ وَسُئِلَ عَنْ الْعَرَجِ فَقَالَ مَا بَلَغَتْ الْمَنْسَكَ ثُمَّ قَالَ أَمَرَنَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنْ نَسْتَشْرِفَ الْعَيْنَيْنِ وَالْأُذُنَيْنِ‏.‏