Is the aforementioned hadith narrated by Zayd ibn Thabit, describing his writing of the revelation for the Messenger of Allah, peace and blessings be upon him, and the accompanying intensity of the descent and difficulty of writing, authentic?

The summary of the ruling is that the mentioned hadith regarding the state of the Prophet, peace and blessings be upon him, when revelation descended, and Zayd ibn Thabit being a scribe of the revelation, is not authentically supported by its chain of narration, especially with the presence of weakness in one of its narrators (Saeed ibn Sulayman ibn Zayd ibn Thabit), who was described as "unknown in status." Additionally, there is a break in the chain of another narration due to the weakness of "Uthman ibn Abd al-Rahman ibn Umar ibn Sa'd ibn Abi Waqqas," about whom it was said, "his narrations are abandoned."

Nevertheless, the state of the Prophet, peace and blessings be upon him, experiencing intense sweating and heaviness when revelation descended, and Zayd ibn Thabit being among the scribes of revelation, is established in authentic hadiths narrated by Al-Bukhari and Muslim.