Mus'ab bin Sa'd narrates from his father, while A'mash said: I know this (hadith) only from the Prophet (peace and blessings of Allah be upon him), he (peace and blessings of Allah be upon him) said: "It is better not to act hastily in anything except for deeds of the Hereafter." Its chain is weak, narrated by Abu Dawood.
Hadith Referenceمشكوة المصابيح / كتاب الآداب / 5058
Hadith Gradingالألبانی:لم تتمّ دراسته | زبیر علی زئی:إسناده ضعيف
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «إسناده ضعيف، رواه أبو داود (4810) ٭ الأعمش مدلس و عنعن .»