Mishkat al-Masabih #3098
Marriage
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
عَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «الْمُتَبَارِيَانِ لَا يُجَابَانِ وَلَا يُؤْكَلُ طَعَامُهُمَا» . قَالَ الْإِمَامُ أَحْمَدُ: يَعْنِي المتعارضين بالضيافة فخراً ورياء
Abu Huraira reported God's Messenger as saying, “The invitations of two people who are rivalling one another should not be accepted, and the food they provide should not be eaten.” The imam Ahmad said it means two people who are competing with one another in providing a feast out of self-glory and ostentation.
Baihaqi transmitted in Shu'ab al-iman
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About Mishkat al-Masabih
This hadith is #3098 from Mishkat al-Masabih, in the Book of Marriage.