Orthodox Jewish writing Eruvin 21b

"What is the meaning of the words: “And much study [lahag] is a weariness of the flesh”? Rav Pappa, son of Rav Aḥa bar Adda, said in the name of Rav Aḥa bar Ulla: This teaches that whoever mocks [malig] the words of the Sages will be sentenced to boiling excrement, which results from the weariness of the flesh of man."

https://www.sefaria.org/Eruvin.21b?lang=bi

https://web.archive.org/web/20201014005101/https://www.sefaria.org/Eruvin.21b?lang=bi