Mu'awiya said that the Prophet forbade the discussion of thorny questions. Abu Dawud transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب العلم / 243
Hadith Gradingالألبانی:ضعيف | زبیر علی زئی:إسناده ضعيف
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «إسناده ضعيف، رواه أبو داود (3656) ٭ عبد الله بن سعد: لم يوثقه غير ابن حبان و قال الساجي: ضعفه أھل الشام .»
Authentication of the Hadith: Its chain of narration is weak. ➊ ‘Abdullah bin Sa‘d bin Furwah al-Bajali ad-Dimashqi was mentioned only by Ibn Hibban among the trustworthy narrators, and he said: «يخطئ» “He used to make mistakes.” [7؍39] ➋ Mughaltai al-Hanafi reported that as-Saji said: «ضعفه أهل الشام فى الحديث» “The people of al-Sham considered him weak in hadith.” [اكمال مغلطائي 2؍275 بحواله حاشيه تهذيب الكمال 4؍147] ➌ This narrator is of unknown status (majhool al-haal), therefore this chain is weak.
Source: Adwa al-Masabih fi Tahqiq Mishkat al-Masabih, Page: 243
Narrated Muawiyah: The Holy Prophet ﷺ forbade the discussion of thorny questions.
Shaykh Umar Farooq Saeedi
Benefits and Issues: Benefit: It is in no way correct that a question regarding a legal issue be asked in the manner of hints or riddles, nor should any mufti respond in an ambiguous or concealed manner.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 3656