Why Jethro Heard While the Wicked Are Buried Alive

"And Jethro heard..." (Exodus 18:1). This is what Scripture says: "And so I saw the wicked buried, and they came" (Ecclesiastes 8:10). But are there wicked who are buried [and come] and walk about, that Solomon said "buried, and they came"? Rather, Rabbi Simon said: these are the wicked who are buried and dead during their lifetimes, as it is said, "All the days of the wicked man he writhes in torment" (Job 15:20). What is "he writhes in torment" (mitholel)? That he is dead (met) and a corpse (halal).