Hadithcore
Al-Adab Al-Mufrad, 1188

Abu Umama reported that the Messenger of Allah, (ﷺ), passed by a man in the mosque who was lying on his front. He kicked him with his foot and said, "Get up. It is the sleep of Jahannam."

حَدَّثَنَا مَحْمُودٌ، قَالَ‏:‏ حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ، قَالَ‏:‏ أَخْبَرَنَا الْوَلِيدُ بْنُ جَمِيلٍ الْكِنْدِيُّ، مِنْ أَهْلِ فِلَسْطِينَ، عَنِ الْقَاسِمِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ أَبِي أُمَامَةَ، أَنَّ رَسُولَ اللهِ صلى الله عليه وسلم مَرَّ بِرَجُلٍ فِي الْمَسْجِدِ مُنْبَطِحًا لِوَجْهِهِ، فَضَرَبَهُ بِرِجْلِهِ وَقَالَ‏:‏ قُمْ، نَوْمَةٌ جَهَنَّمِيَّةٌ‏.‏

References2 variants
In-Book Reference
Book 48, Hadith 14
English Reference
Book 48, Hadith 1188