Sunan an-Nasa'i, Hadith 3107 ⓘ
It was narrated that Abu Hurairah said: "No man who weeps for fear of Allah will be touched by the Fire until the milk goes back into the udders. And the dust (of Jihad) in the cause of Allah and the smoke of Hell, will never be combined in the nostrils of a Muslim."
أَخْبَرَنَا أَحْمَدُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا جَعْفَرُ بْنُ عَوْنٍ، قَالَ حَدَّثَنَا مِسْعَرٌ، عَنْ مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ عِيسَى بْنِ طَلْحَةَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ لاَ يَبْكِي أَحَدٌ مِنْ خَشْيَةِ اللَّهِ فَتَطْعَمَهُ النَّارُ حَتَّى يُرَدَّ اللَّبَنُ فِي الضَّرْعِ وَلاَ يَجْتَمِعُ غُبَارٌ فِي سَبِيلِ اللَّهِ وَدُخَانُ جَهَنَّمَ فِي مَنْخَرَىْ مُسْلِمٍ أَبَدًا .
also referenced under: Book 25, Hadith 23 (In-Book) & Volume 4, Book 25, Hadith 3109 (DarusSalam)