ENOfficial
It was narrated that Wathilah bin Asqa’ Al-Laithi said: “The Messenger of Allah (ﷺ) took hold of the top of the Tharid and said: ‘Eat in the Name of Allah from its sides and leave the top, for the blessing comes from its top.’”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا أَبُو حَفْصٍ، عُمَرُ بْنُ الدَّرَفْسِ حَدَّثَنِي عَبْدُ الرَّحْمَنِ بْنُ أَبِي قَسِيمَةَ، عَنْ وَاثِلَةَ بْنِ الأَسْقَعِ اللَّيْثِيِّ، قَالَ أَخَذَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ بِرَأْسِ الثَّرِيدِ فَقَالَ " كُلُوا بِسْمِ اللَّهِ مِنْ حَوَالَيْهَا وَاعْفُوا رَأْسَهَا فَإِنَّ الْبَرَكَةَ تَأْتِيهَا مِنْ فَوْقِهَا " .
sunnah.com