ENOfficial
It was narrated from ‘Aishah, the Mother of the Believers, that some people said: “O Messenger of Allah, some people bring us meat, and we do not know whether the Name of Allah has been mentioned over it or not.” He said: “Say: Bismillah and eat.’ They were new in Islam.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ الرَّحِيمِ بْنُ سُلَيْمَانَ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ أُمِّ الْمُؤْمِنِينَ، أَنَّ قَوْمًا، قَالُوا يَا رَسُولَ اللَّهِ إِنَّ قَوْمًا يَأْتُونَا بِلَحْمٍ لاَ نَدْرِي ذُكِرَ اسْمُ اللَّهِ عَلَيْهِ أَمْ لاَ قَالَ " سَمُّوا أَنْتُمْ وَكُلُوا " . وَكَانُوا حَدِيثَ عَهْدٍ بِالْكُفْرِ .
sunnah.com