It was narrated from Anas bin Malik that the Messenger of Allah ﷺ said:
“The people of Hell will be made to weep and they will weep until they run out of tears. Then they will weep blood until something like trenches appear on their faces, and if ships were placed in them they would float.”

حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، حَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدٍ، عَنِ الأَعْمَشِ، عَنْ يَزِيدَ الرَّقَاشِيِّ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ ﷺ " يُرْسَلُ الْبُكَاءُ عَلَى أَهْلِ النَّارِ فَيَبْكُونَ حَتَّى يَنْقَطِعَ الدُّمُوعُ ثُمَّ يَبْكُونَ الدَّمَ حَتَّى يَصِيرَ فِي وُجُوهِهِمْ كَهَيْئَةِ الأُخْدُودِ لَوْ أُرْسِلَتْ فِيهِ السُّفُنُ لَجَرَتْ " .