Saudi Arabia along with other energy-rich Gulf states has long provided crucial funding to Egypt, upping support after Sisi took power nearly a decade ago, and as an acute financial crisis took hold last year.
"The mean, the scoundrels and the nouveau-riche have no right to insult their masters," he wrote, drawing on derogatory stereotypes and claims of historical superiority.
Another well-known Saudi commentator, Ali Shihabi, later tweeted: "Egypt is a black hole that will never close unless the govt is able to make material structural reforms."
Tawfik's article has been removed from Al Gomhuria's website and replaced by an editorial lauding Egyptian-Saudi relations as "historic and eternal".
Additional reporting by Nadine Awadalla and Aziz El Yaakoubi, Writing by Aidan LewisOur Standards: The Thomson Reuters Trust Principles.