Is a weak hadith cited as evidence in encouraging good and warning against evil?

Question:
May Allah reward you and bless you. This questioner, Khalid, asks: Are weak hadiths cited as evidence in encouraging good and warning against evil?

Answer:
Yes, the scholars have mentioned that weak hadiths are cited as evidence in encouraging good, warning against evil, preaching, and giving advice. However, no legal ruling regarding what is lawful or forbidden is established based on them; they are mentioned solely for the purpose of encouraging good and warning against evil. This is on the condition that the weakness of the hadith is slight, not severe. The weakness must not be severe. If a hadith is weak, it is cited in sermons, in encouraging good, and in warning against evil, because nothing but good results from doing so, and no legal ruling of obligation, acceptance, or prohibition is established upon it.