The Prophet ﷺ said, "No one who weeps out of fear of Allah will enter the Fire until milk returns to the udder. And the dust gathered while striving in the path of Allah and the smoke of Hell will never combine in the nostrils of a single person."
عن النبي ﷺ قال: لا يلج النار أحد بكى من خشية الله عز وجل حتى يعود اللبن في الضرع، ولا يجتمع غبار في سبيل الله ودخان جهنم في منخري امرئ أبدا.
Ahmad (10560) narrated it, with this wording, from Yazid (that is Ibn Harun) and Abu Abdul-Rahman Muqri. Tirmidhi (1633) and Nasai (3108) narrated it via Ibn Mubarak. Hakim (4/260) narrated it via Jafar bin Awn. All of them narrated from Abdul-Rahman bin Abdullah Masudi, from Muhammad bin Abdul-Rahman, the freed slave of the family of Talha, from Isa bin Talha, from Abu Hurairah, who mentioned it.Its chain of transmission is sahih. Masudi's memory became confused later in life, but the hearing of Abu Abdul-Rahman, that is Abdullah bin Yazid Muqri, and of Jafar bin Awn, took place before the confusion set in.Tirmidhi said, "This is a hasan sahih hadith."Hakim said, "Its chain of transmission is sahih."The hadith has other routes and different wordings that are not free from some criticism, and Nasai (3107–3115) cited many of its routes and wordings.See Musnad Ahmad (7480, 8479), Jihad by Ibn Abu Asim (121), and Ilal Daraqutni (8/336).