What is the ruling on the imam repeating fabricated and weak hadiths, and his saying "Indeed, by God" after the verse "Is not God the most just of judges?", and his saying "May God establish it and perpetuate it" upon the call to commence prayer (iqamah)?

We ask Allah to guide the Imam to follow the authentic hadiths and avoid the weak and fabricated ones. His saying "Yes, by Allah" after Surat At-Tin was mentioned in a hadith that scholars differed upon regarding its acceptance, classifying it between weak and hasan (good), and some scholars acted upon it and deemed it desirable. As for his saying "May Allah establish it and perpetuate it" during the iqamah, it is narrated in a weak hadith. The general principle is to say what the mu'adhin says, but whoever says that, their action is not considered an innovation or forbidden.