Abdullah bin Abbas (may Allah be pleased with them) narrates: The Prophet Muhammad (peace be upon him) went to visit a Bedouin who was ill. The Prophet (peace be upon him) said: "There is no cause for worry; if Allah wills, it will be a means of purification." But the man replied: "No, rather it is a fever that is raging upon an old man and will take him to his grave." The Prophet (peace be upon him) said: "Then it will be as you say."
Hadith Referenceصحیح ابن حبان / كتاب الجنائز وما يتعلق بها مقدما أو مؤخرا / 2959
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «مختصر الأدب المفرد» (391): خ.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط مسلم