The Grading of the Hadith: "Surat al-Zalzalah is equivalent to one-third of the Qur'an"

Question:
May Allah reward you with good. I read in Ibn Kathir's tafsir, in the commentary on Surat al-Zalzalah, hadiths narrated by al-Tirmidhi stating that this surah is equivalent to half of the Qur'an, and another hadith stating it is equivalent to a quarter of the Qur'an. Are these hadiths authentic?

Answer:
I have not looked into them, but it is the custom of al-Hafiz Ibn Kathir (may Allah have mercy on him) to be careful in specifying the grading of a hadith, so you should verify the grading of these hadiths as mentioned by Ibn Kathir. Yes.