Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
suyuti:422-386bIbn ʿUmar
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السيوطي:٤٢٢-٣٨٦b

"عَنِ ابْنِ عُمَرَ أنَّ رَسُولَ الله ﷺ مَرَّ عَلَى سُوقِ الْمَدِينَةِ عَلَى طَعَامٍ أَعْجَبَهُ حُسْنُهُ، فَوَقَفَ رَسُولُ الله ﷺ فَأَدْخَلَ يَدَهُ فِى الطَّعَامِ فَأَخْرَجَ شَيْئًا لَيْسَ كَالظَّاهِرِ، فَأقفَ لِصَاحِبِ الطَّعَامِ، ثُمَّ نَادَى: يَأيُّهَا النَّاسُ إِنَّهُ لآ غِشَّ بَيْنَ الْمُسْلِمِينَ، لَيْسَ مِنَّا مَنْ غَشَّنَا".  

ابن النجار

See similar narrations below:

Collected by Dārimī, Suyūṭī
darimi:2583Muḥammad b. al-Ṣalt > Abū ʿAqīl Yaḥyá b. al-Mutawakkil > al-Qāsim b. ʿUbaydullāh > Sālim > Ibn ʿUmar

[Machine] The Messenger of Allah ﷺ passed by some food in the market of the city. He was amazed by its beauty, so the Messenger of Allah ﷺ put his hand in it and took out something that was not visible. He frowned at the food vendor and then said, "There should be no cheating among Muslims. Whoever deceives us is not one of us."  

الدارمي:٢٥٨٣حَدَّثَنَا مُحَمَّدُ بْنُ الصَّلْتِ حَدَّثَنَا أَبُو عَقِيلٍ يَحْيَى بْنُ الْمُتَوَكِّلِ قَالَ أَخْبَرَنِي الْقَاسِمُ بْنُ عُبَيْدِ اللَّهِ عَنْ سَالِمٍ عَنْ ابْنِ عُمَرَ

أَنَّ رَسُولَ اللَّهِ ﷺ مَرَّ بِطَعَامٍ بِسُوقِ الْمَدِينَةِ فَأَعْجَبَهُ حُسْنُهُ فَأَدْخَلَ رَسُولُ اللَّهِ ﷺ يَدَهُ فِي جَوْفِهِ فَأَخْرَجَ شَيْئًا لَيْسَ كَالظَّاهِرِ فَأَفَّفَ لِصَاحِبِ الطَّعَامِ ثُمَّ قَالَ «لَا غِشَّ بَيْنَ الْمُسْلِمِينَ مَنْ غَشَّنَا فَلَيْسَ مِنَّا»  

suyuti:422-416bIbn ʿUmar
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السيوطي:٤٢٢-٤١٦b

"عَنِ ابْنِ عُمَرَ أَنَّ رَسُولَ الله ﷺ مَرَّ بِسُوقِ الْمَدِينَةِ عَلَى طَعَامٍ أَعْجَبَهُ، فَأَدْخَلَ يَدَهُ فِى جَوْف الطَّعَامِ فَأَخْرَجَ شَيْئًا لَيْسَ بالظَّاهِرِ فَأَفَّفَ رَسُولُ الله ﷺ بِصَاحِبِ الطَّعَامِ، ثُمَّ نَادَى: أَيُّها النَّاسُ لاَ غِشَّ بَيْنَ الْمُسْلِمَينَ، مَنْ غَشَّنَا فَلَيْسَ مِنَّا".  

[د] أبو داود