What are the characteristics of human utterances in religious writings derived from the Quran and Sunnah, bearing in mind that they are not revealed utterances and do not possess the characteristics of the utterances of verses and hadiths?

Describing the discourse of scholars, which revolves around the Qur'an and the Sunnah, as being "from the religion of Allah" is not disbelief. The intent is that their words clarify the intent of Allah and His Messenger, not that their words are infallible. Allah has commanded us to ask the people of remembrance and to obey them, and those in authority are the jurists and scholars. However, a distinction must be made between the Qur'an and the Sunnah and our understanding of them. Therefore, one should not directly impose Allah's ruling upon people as if it were one's own, for one does not know whether one will accurately grasp Allah's ruling or not. The questioner himself alluded to using "from the religion of Allah" to describe religious sciences.