The Ruling on Acting on Weak Hadiths in the Virtues of Deeds

Question:
May Allah reward you, Honorable Shaykh. A questioner says: Is it permissible to act on weak hadiths in the virtues of deeds?

Answer:
Yes, a weak hadith may be acted upon in encouraging good and warning against evil, provided that one does not assert with certainty that it is attributed to the Messenger of Allah (peace and blessings be upon him). Rather, one should say, "It is reported thus" or "It is narrated thus from the Messenger of Allah (peace and blessings be upon him)," and not say, "The Messenger of Allah (peace and blessings be upon him) said." One must not assert it with certainty, but rather use a form of caution. And provided that this hadith is not extremely weak; it must not be extremely weak, or known to be fabricated. If it is known to be fabricated and false, then it is not permissible to act on it or to narrate it. Yes.