וְלֹֽא־יָכְל֣וּ הַֽחַרְטֻמִּ֗ים לַעֲמֹ֛ד לִפְנֵ֥י מֹשֶׁ֖ה מִפְּנֵ֣י הַשְּׁחִ֑ין כִּֽי־הָיָ֣ה הַשְּׁחִ֔ין בַּֽחֲרְטֻמִּ֖ם וּבְכָל־מִצְרָֽיִם׃
At hindi makatayo ang mga salamangkero sa harap ni Moises dahil sa pigsa, sapagkat ang pigsa ay nasa mga salamangkero at nasa lahat ng mga Egipcio.
Ramban
AND THE MAGICIANS COULD NOT STAND BEFORE MOSES. They were ashamed, and confounded, and covered their heads207Jeremiah 14:3. since they were full of boils and could not rescue themselves. Therefore they made no appearance in the royal palace, nor did they appear before Moses in the streets. And so they were imprisoned in their homes.
Tur HaArokh
ולא יכלו החרטומים לעמוד, “and the sorcerers could no longer stand before Moses, etc.” This is a description of the embarrassment of the sorcerers at their impotence, so that they withdrew to their private quarters so as not to have to face any hostile or disrespectful audience.
Rav Hirsch
V. 11. Die Schriftkundigen waren wahrscheinlich auch Ärzte. Diese die Arzneikunst herausfordernde Plage traf sie daher zuerst und — wie es scheint, da sie sonst ja nicht mit Mosche zusammen kamen — sofort, nachdem der Ruß ausgestreut worden war.