Muwatta Malik, Book 23, Hadith 5 (USC-MSA) ⓘ

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.

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 ‏.‏