Hadith 510350
Chapter 23: Sacrificial Animals - كتاب الضحايا
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ عَبَّادِ بْنِ تَمِيمٍ، أَنَّ عُوَيْمِرَ بْنَ أَشْقَرَ، ذَبَحَ ضَحِيَّتَهُ قَبْلَ أَنْ يَغْدُوَ، يَوْمَ الأَضْحَى وَأَنَّهُ ذَكَرَ ذَلِكَ لِرَسُولِ اللَّهِ صلى الله عليه وسلم فَأَمَرَهُ أَنْ يَعُودَ بِضَحِيَّةٍ أُخْرَى .
Yahya related to me from Malik from Yahya ibn Said from Abbad ibn Tamin that one time Uwaymir ibn Ashqar sacrificed his animal before the prayer on the morning of the Day of Sacrifice, and he mentioned that the Messenger of Allah, may Allah bless him and grant him peace, had ordered him to sacrifice another animal.
Reference Muwatta Malik 510350
USC-MSA web (English) reference : Book 23, Hadith 5