"The Messenger of Allah ﷺ ordered that we check the eyes and ears, and not to slaughter the Muqabalah, nor the Mudabarah, nor the Sharqa', nor the Kharqa'"  

أَمَرَنَا رَسُولُ اللَّهِ ﷺ أَنْ نَسْتَشْرِفَ الْعَيْنَ وَالأُذُنَ وَأَنْ لاَ نُضَحِّيَ بِمُقَابَلَةٍ وَلاَ مُدَابَرَةٍ وَلاَ شَرْقَاءَ وَلاَ خَرْقَاءَ  

"The Muqabalah is the one whose ears have been severed, the Mudabarah is the one with the sides of its ears cut off, and the Sharqa' is one with its ears split, and the Khurqa' is the one whose ears have a hole pierced through them."  

عَنِ النَّبِيِّ ﷺ مِثْلَهُ وَزَادَ قَالَ الْمُقَابَلَةُ مَا قُطِعَ طَرَفُ أُذُنِهَا وَالْمُدَابَرَةُ مَا قُطِعَ مِنْ جَانِبِ الأُذُنِ وَالشَّرْقَاءُ الْمَشْقُوقَةُ وَالْخَرْقَاءُ الْمَثْقُوبَةُ