Muwatta Malik 1703
موطأ مالك#1703Sahihوَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ أَبِي نُعَيْمٍ، وَهْبِ بْنِ كَيْسَانَ قَالَ أُتِيَ رَسُولُ اللَّهِ صلى الله عليه وسلم بِطَعَامٍ وَمَعَهُ رَبِيبُهُ عُمَرُ بْنُ أَبِي سَلَمَةَ فَقَالَ لَهُ رَسُولُ اللَّهِ صلى الله عليه وسلم " سَمِّ اللَّهَ وَكُلْ مِمَّا يَلِيكَ " .
Yahya related to me from Malik from Abu Nuaym that Wahb ibn Kaysan said, "The Messenger of Allah, may Allah bless him and grant him peace, was brought food while his stepson Umar ibn Salama was with him. The Messenger of Allah, may Allah bless him and grant him peace, said to him, 'Say "Bismillah," and eat what is in front of you
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 49:33