Hadithcore
Hadith #2116460

Ibn 'Abbas (RAA) narrated that the Messenger of Allah (ﷺ) said:

"A Muslim's name is sufficient for him, so if he forgets to mention Allah's name when he slaughters an animal, he should mention Allah's name, then eat it." Related by Ad-Daraqutni but there is a weak narrator in its chain. Also there is Muhammad bin Yazid bin Sinan in its chain who is truthful but had a weak memory.

وَعَنِ اِبْنِ عَبَّاسٍ رَضِيَ اَللَّهُ عَنْهُمَا; أَنَّ اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-قَالَ: {

اَلْمُسْلِمُ يَكْفِيهِ اِسْمُهُ, فَإِنْ نَسِيَ أَنْ يُسَمِّيَ حِينَ يَذْبَحُ, فَلْيُسَمِّ, ثُمَّ لِيَأْكُلْ

} أَخْرَجَهُ اَلدَّارَقُطْنِيُّ, وَفِي إِسْنَادِهِ مُحَمَّدُ بنُ يَزِيدَ بنِ سِنَانٍ, وَهُوَ صَدُوقٌ ضَعِيفُ اَلْحِفْظِ.‏ (1759)‏ .‏

References2 variants
Sunnah.com reference
Book 12, Hadith 26
Arabic/English book reference
Book 12, Hadith 1384