حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنِ الأَسْوَدِ بْنِ قَيْسٍ، عَنْ جُنْدَبٍ الْبَجَلِيِّ، أَنَّهُ سَمِعَهُ يَقُولُ شَهِدْتُ الأَضْحَى مَعَ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ فَذَبَحَ أُنَاسٌ قَبْلَ الصَّلاَةِ فَقَالَ النَّبِيُّ ـ صلى الله عليه وسلم ـ " مَنْ كَانَ ذَبَحَ مِنْكُمْ قَبْلَ الصَّلاَةِ فَلْيُعِدْ أُضْحِيَّتَهُ وَمَنْ لاَ فَلْيَذْبَحْ عَلَى اسْمِ اللَّهِ " .
It wasnarrated from Aswad bin Qais that he heard Jundub Al-Bajalisay: “Iwas present on Adha day with the Messenger of Allah (PBUH), andsomepeople slaughtered before the prayer. The Prophet (PBUH) said:‘Whoever among you has slaughtered before the prayer, let himrepeathis sacrifice, and whoever has not, let him offer hissacrifice in theName of Allah.’” Translation Not Available
Book Ref: Sunan Ibn Majah Book 26 Hadith 3152
Web Ref: Sunan Ibn Majah Vol 4 Book 26 Hadith 3152