مَنْ ذَبَحَ قَبْلَ الصَّلاَةِ فَلْيَذْبَحْ شَاةً مَكَانَهَا وَمَنْ لَمْ يَكُنْ ذَبَحَ فَلْيَذْبَحْ عَلَى اسْمِ اللَّهِ "
Jundab b. Sufyan reported: I was with Allah's Messenger (ﷺ) (on the occasion) of 'Id al-Adha. After he had completed the prayer with people, he found that the goats had been slaughtered, whereupon he said: He who slaughtered sacrificial animal before the prayer should slaughter a goat (again) in its stead and he who has not slaughtered he should slaughter it by reciting the name of Allah.
مواضع دراسته في كتب التخريج والشروح
المنهاج في شرح صحيح مسلم بن الحجاجج١٣ ص٩٧·كِتَاب الْأَضَاحِيِّ
إتحاف المهرة بالفوائد المبتكرة من أطراف العشرةج٤ ص٨٤·جُنْدُبِ بْنِ عَبْدِ اللَّهِ الْبَجَلِيِّ
تحفة الأشراف بمعرفة الأطرافج٢ ص٤٤٠·حرف الجيم