Sunan Abi Dawud 2885
سنن أبي داود#2885Da'ifNarrated Abdullah ibn Amr ibn al-'As: The Prophet (ﷺ) said: Knowledge has three categories; anything else is extra; a precise verse, or an established sunnah (practice), or a firm obligatory duty
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniDaif
Muhammad Muhyi Al-Din Abdul HamidDaif
Shuaib Al ArnautDaif
Zubair Ali ZaiDaif
In-book reference: 19:1