The Book of Marriage
Ṣaḥīḥ Muslim 3524
شَرُّ الطَّعَامِ طَعَامُ الْوَلِيمَةِ يُمْنَعُهَا مَنْ يَأْتِيهَا وَيُدْعَى إِلَيْهَا مَنْ يَأْبَاهَا وَمَنْ لَمْ يُجِبِ الدَّعْوَةَ فَقَدْ عَصَى اللَّهَ وَرَسُولَهُ
sharru aṭ-ṭaʿāmi ṭaʿāmu al-walīmah yumnaʿuhā man yaʾtīhā wayudʿā ilayhā man yaʾbāhā waman lam yujibi ad-daʿwaha faqad ʿaṣā-Llāh warasūlah
Transliteration generated from the Arabic vowel marks
The full narration
Abu Haraira (Allah be pleased with him) reported Allah's Apostle (ﷺ) as saying. The worst kind of food is at the wedding feast from which one who comes is turned away, and he who refuses it is invited, and he who did not accept the invitation disobeyed Allah and His Messenger (ﷺ)
Source
Ṣaḥīḥ Muslim · 3524
Ṣaḥīḥ