What is the authenticity of the hadith: “Treat your illnesses with charity”?

The questioner : The third question: The hadith In some of your books, you have graded the hadiths, or the hadith, as hasan (good), while in others, it appears to me that you have said it is da'if (weak). We want a definitive ruling on this matter: is it hasan (good) or da'if (weak)?

The Shaykh : If you know that it is hasan li ghayrihi (good due to supporting evidence), then the contradiction between grading it weak and grading it good is resolved!

The questioner : May Allah bless you.

The Shaykh : And may He reward you.