Opinion-based derivation of the Islamic laws
ووجدت بخط الشهيد محمد بن مكي قدس سره حديثا طويلا عن عنوان البصري ، عن أبي عبدالله جعفر بن محمد ( عليه السلام ) ، يقول فيه : سل العلماء ما جهلت ، وإياك أن تسألهم تعنتا وتجربة ، واياك أن تعمل برأيك شيئا ، وخذ بالاحتياط في جميع امورك ما تجد إليه سبيلا ، واهرب من الفتيا هربك من الاسد ، ولا تجعل رقبتك عتبة للناس
And it was found in the writing of Al Shaheed Muhammad Bin Makky, pure be his soul, in a lengthy Hadith from a section of Basra narrates:
Abu Abdullah Ja’far Bin Muhammad-asws saying therein: ‘Question the scholars in what you are ignorant of, and beware of questioning them due to intransigence and trying them, and beware of acting upon anything by opinion, and take to precaution in all of your affairs in which you have found a way, flee from the uncertainty like you flee from the lion, and do not extend your neck to the people,’ (give verdict/fatwa).[1]
NB: Taqleed and Ijtihaad | Hubeali.com
[1] Wasail ul Shai, H 33524