Acting upon weak narrations
In the name of Allah, the most Beneficent, the most Merciful.
Weak narrations are not acceptable only in regards to aqeedah and in establishing Shariah rulings, but are acceptable when it comes to virtues or fadhaails.
Scholars such as Imam Ibn Salah and Imam Nawawi have always stated that there is a leeway in quoting weak hadiths in virtues of acts. Even Imam Bukhari (RA) brought weak narrations in his book “Al Adabul Mufrad”, indicating that he also accepts weak narrations in regards to virtues of good deeds.
With respect to your question, there is nothing wrong in acting upon weak hadiths in regards to virtues of good deeds. This is an Islamic principle.
Finally, we should bear in mind that the pious and learned amongst the Ummah cannot be unanimous upon something that is false or not part of Islam. The Prophet of Allah Sullallahu Alahi Wasalam has said:
“Allah (SWA) will not unite the Ummah of Mohammad Sallallahu Alahi Wasalam upon misguidance. Allah’s help is with the majority. Whoever deviates from them will be thrown into the fire of Jahannam.” (Sunan Tirmizi p.39 v.2)
Only Allah Knows Best
Mohammed Tosir Miah
Darul Ifta Birmingham.