Al -Mustadrak on the two Sahihs, one of the books of the hadith of the Prophet's hadith among the Sunnis and the community. It was collected by Imam Abu Abdullah Muhammad bin Abdullah Al -Hakim Al -Nisaburi. He gathered the hadiths that he believed were correct and on the condition of the two sheikhs (Al -Bukhari and Muslim) or on the condition of one of them, and the two sheikhs (Bukhari and Muslim) did not see them in their authenticity, but they graduated from their narrators in their books, then added some of the hadiths that his diligence led to corrected. But the modern scholars of the Sunnis and the community went to say that the ruler was lenient in correction, so many weak and placed hadiths fell into the book. Al -Hafiz Al -Dhahabi summarized the book, and added some comments on him