What is the validity of Dr. Ahmed Emara's statement that there are erroneous hadiths in Sahih Al-Bukhari and Sahih Muslim, such as the hadith: "The meat of cows is harmful, and their milk is beneficial"?

If the questioner knew the true nature of the person mentioned, his lies, his deviation, his distortion of heavenly books, and his claim that a menstruating woman should fast, she would realize that his words are not worth listening to. As for the hadiths in Sahih (definition) al-Bukhari, they are undoubtedly authentic, and there is a consensus among scholars on this matter. Regarding the mentioned hadith (definition) about beef being a disease, its milk a cure, and its ghee a medicine, it is not in Sahih al-Bukhari. Rather, what is in it is that the Prophet (peace and blessings be upon him), during the Farewell Pilgrimage, "sacrificed cows on behalf of his wives." Ibn al-Qayyim and al-Sakhawi deemed it weak due to the lack of authenticity in its chain of narration and the weakness of its routes. It has been authentically reported that the Prophet (peace and blessings be upon him) sacrificed cows on behalf of his wives, and he would not offer something harmful as an offering. Even according to those who strengthen theith by combining its various routes, it does not necessitate the general prohibition or disfavor of beef.