Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
muslim:1962cZiyād b. Yaḥyá al-Ḥassānī > Ḥātim / Ibn And Rdān > Ayyūb > Muḥammad b. Sīrīn > Anas b. Mālik

Messenger of Allah ﷺ addressed us on the day of 'Id al-Adha. He smelt the odour of flesh and he prohibited thern from slaughtering (the animals before the 'Id prayer), saying: He who slaughtered the animals (before the 'Id prayer) should do that again (as it is not valid as a sacrifice).  

مسلم:١٩٦٢cوَحَدَّثَنِي زِيَادُ بْنُ يَحْيَى الْحَسَّانِيُّ حَدَّثَنَا حَاتِمٌ يَعْنِي ابْنَ وَرْدَانَ حَدَّثَنَا أَيُّوبُ عَنْ مُحَمَّدِ بْنِ سِيرِينَ عَنْ أَنَسِ بْنِ مَالِكٍ قَالَ

خَطَبَنَا رَسُولُ اللَّهِ ﷺ يَوْمَ أَضْحًى قَالَ فَوَجَدَ رِيحَ لَحْمٍ فَنَهَاهُمْ أَنْ يَذْبَحُوا قَالَ مَنْ كَانَ ضَحَّى فَلْيُعِدْ ثُمَّ ذَكَرَ بِمِثْلِ حَدِيثِهِمَا