i posted this from bahar e shari'at because i believe it is connected with the recent disagreement about dalil zanni or ijma'a zanni. here, [i think] sadr al-shari'ah is saying that if something is proven with dalil zanni, it is necessary for us to have belief on it.
Could you please give a Sharh of this What does the Shaykh mean by Wajib? And obligatory belief is established by unequivical Qur'an, Mutawatir, and Sahih Ahaad AHadith is what I thought
sadr al-shari'ah mawlana amjad 'ali a'zami writes in bahar e shari'at: wajib e iy'tiqadi wo ke daleel zanni se us ki zaroorat saabit ho. a necessary belief is that whose necessity is proven from speculative evidence [daleel zanni].