The Prophet ﷺ never used to eat anything unless it was named for him so that he might know what it was

Narrated Khalid bin Al-Walid:

That he went with Allah's Apostle to the house of Maimuna, who was his and Ibn 'Abbas' aunt. He found with her a roasted mastigure which her sister Hufaida bint Al-Harith had brought from Najd. Maimuna presented the mastigure before Allah's Apostle who rarely started eating any (unfamiliar) food before it was described and named for him. (But that time) Allah's Apostle stretched his hand towards the (meat of the) mastigure whereupon a lady from among those who were present, said, "You should inform Allah's Apostle of what you have presented to him. O Allah's Apostle! It is the meat of a mastigure." (On learning that) Allah's Apostle withdrew his hand from the meat of the mastigure. Khalid bin Al-Walid said, "O Allah's Apostle! Is this unlawful to eat?" Allah's Apostle replied, "No, but it is not found in the land of my people, so I do not like it." Khalid said, "Then I pulled the mastigure (meat) towards me and ate it while Allah's Apostle was looking at me.

حَدَّثَنَا مُحَمَّدُ بْنُ مُقَاتِلٍ أَبُو الْحَسَنِ، أَخْبَرَنَا عَبْدُ اللَّهِ، أَخْبَرَنَا يُونُسُ، عَنِ الزُّهْرِيِّ، قَالَ أَخْبَرَنِي أَبُو أُمَامَةَ بْنُ سَهْلِ بْنِ حُنَيْفٍ الأَنْصَارِيُّ، أَنَّ ابْنَ عَبَّاسٍ، أَخْبَرَهُ أَنَّ خَالِدَ بْنَ الْوَلِيدِ الَّذِي يُقَالُ لَهُ سَيْفُ اللَّهِ أَخْبَرَهُ أَنَّهُ، دَخَلَ مَعَ رَسُولِ اللَّهِ ﷺ عَلَى مَيْمُونَةَ ـ وَهْىَ خَالَتُهُ وَخَالَةُ ابْنِ عَبَّاسٍ ـ فَوَجَدَ عِنْدَهَا ضَبًّا مَحْنُوذًا، قَدِمَتْ بِهِ أُخْتُهَا حُفَيْدَةُ بِنْتُ الْحَارِثِ مِنْ نَجْدٍ، فَقَدَّمَتِ الضَّبَّ لِرَسُولِ اللَّهِ ﷺ وَكَانَ قَلَّمَا يُقَدِّمُ يَدَهُ لِطَعَامٍ حَتَّى يُحَدَّثَ بِهِ وَيُسَمَّى لَهُ، فَأَهْوَى رَسُولُ اللَّهِ ﷺ يَدَهُ إِلَى الضَّبِّ، فَقَالَتِ امْرَأَةٌ مِنَ النِّسْوَةِ الْحُضُورِ أَخْبِرْنَ رَسُولَ اللَّهِ ﷺ مَا قَدَّمْتُنَّ لَهُ، هُوَ الضَّبُّ يَا رَسُولَ اللَّهِ. فَرَفَعَ رَسُولُ اللَّهِ ﷺ يَدَهُ عَنِ الضَّبِّ، فَقَالَ خَالِدُ بْنُ الْوَلِيدِ أَحَرَامٌ الضَّبُّ يَا رَسُولَ اللَّهِ قَالَ " لاَ وَلَكِنْ لَمْ يَكُنْ بِأَرْضِ قَوْمِي فَأَجِدُنِي أَعَافُهُ ". قَالَ خَالِدٌ فَاجْتَرَرْتُهُ فَأَكَلْتُهُ وَرَسُولُ اللَّهِ ﷺ يَنْظُرُ إِلَىَّ.