This Hadith is mentioned by
Al-Suyuty in his book Al-Jami` Al-Saghir where he said that this Hadith is related by
Al-Bayhaqy in his book Al-Shu`ab. Al-Suyuty ranked the Hadith in question as Da`if (weak) because its Sanad (chain of narrators) contains
Bishr ibn Al-Sirry who is declared by Al-Suyuty as belonging to Jahmiyyah (a deviant Islamic sect denying some Attributes of Allah, claiming they are ascribed to people and cannot be ascribed to Allah).Moreover, it is mentioned in the book of Majma` Al-Zawa'id: "This Hadith is related by
Abu Ya`la on the authority of
`Aishah. Its Sanad contains
Mus`ab ibn Thabit who is considered a Thiqah (trustworthy) narrator by
Ibn Hibban but some other scholars of Hadith considered him Da`if."In the book of Al-Taqrib, the narrator mentioned above is declared as not being consistently accurate.However, the meaning of the Hadith is correct, for it is Mustahab (desirable) for Muslims to perfect their work, doing it in a way fully consistent with Shari`ah (Islamic law), whether it is Salah (Prayer), Sawm (Fast), and so on.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.