عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ اشْتَرَيْتُ كَبْشًا أُضَحِّي بِهِ فَعَدَا الذِّئْبُ فَأَخَذَ الْأَلْيَةَ قَالَ فَسَأَلْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَقَالَ ضَحِّ بِهِ
It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him), he says: I bought a ram for sacrifice, but a wolf attacked it and took away its haunch. Then when I asked the Noble Prophet (peace and blessings be upon him) about this, he (peace and blessings be upon him) said: You can sacrifice it.