Ibn 'Abbas (RAA) narrated that the Messenger of Allah ( صلی اللہ علیہ وسلم ) 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. 'Abdur Razzaq transmitted it with a sound chain of narrators on the authority of Ibn 'Abbas but it is not connected up to the Prophet ( صلی اللہ علیہ وسلم ). Abu Dawud narrated a similar hadith that reads, "The slaughtering (of an animal) by any Muslim is Halal (lawful) whether or not he mentioned Allah's name over it." Its narrators are reliable.