Sahih Muslim 2060
Sahih Muslim · Book 36: The Book of Drinks · The believer eats in one intestine and the disbeliever eats in seven intestines.
Nafi' reported that Ibn 'Umar saw a poor man. He placed food before him and he ate much. He (Ibn 'Umar) said:
وَحَدَّثَنَا أَبُو بَكْرِ بْنُ خَلاَّدٍ الْبَاهِلِيُّ ، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ ، حَدَّثَنَا شُعْبَةُ ، عَنْ وَاقِدِ، بْنِ مُحَمَّدِ بْنِ زَيْدٍ أَنَّهُ سَمِعَ نَافِعًا ، قَالَ رَأَى ابْنُ عُمَرَ مِسْكِينًا فَجَعَلَ يَضَعُ بَيْنَ يَدَيْهِ وَيَضَعُ بَيْنَ يَدَيْهِ - قَالَ - فَجَعَلَ يَأْكُلُ أَكْلاً كَثِيرًا - قَالَ - فَقَالَ لاَ يُدْخَلَنَّ هَذَا عَلَىَّ فَإِنِّي سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " إِنَّ الْكَافِرَ يَأْكُلُ فِي سَبْعَةِ أَمْعَاءٍ " .
He should not come to me. for I heard Allah's Messenger (ﷺ) as saying that the non-Muslim eats in seven intestines.