´It was narrated from Abu Hurairah that the Prophet (ﷺ) visited a sick person, due to an illness that he was suffering from and Abu Hurairah was with him. The Messenger of Allah (ﷺ) said:` “Be of good cheer, for Allah says: ‘It is My fire which I have causes to overwhelm My believing slave in this world, to be his share of the Fire in the Hereafter.”
Hadith Referenceسنن ابن ماجه / كتاب الطب / 3470
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:حسن
Hadith Takhrij«تفرد بہ ابن ماجہ ، ( تحفة الأشراف : 15439 ، ومصباح الزجاجة : 1209 ) ، وقد أخرجہ : مسند احمد ( 2/440 ) ( صحیح ) »
Narrated from Abu Huraira (may Allah be pleased with him) that the Prophet Muhammad (peace and blessings be upon him) visited a man who was suffering from tuberculosis. He said: "Rejoice, for Allah the Exalted says: This is My fire which I impose upon My sinful servant so that it may become his share from the fire of Hell."
Shaykh Dr. Abdur Rahman Freywai
Explanation: 1: That is, he will be protected from the fire of Hell in the Hereafter. The Prophet (sallallahu alayhi wa sallam) would also say at the time of visiting a sick person: "Laa ba’sa, tuhoorun in shaa Allah."
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 2088