וַיֵּצֵ֥א אֵה֖וּד הַֽמִּסְדְּר֑וֹנָה וַיִּסְגֹּ֞ר דַּלְת֧וֹת הָעַלִיָּ֛ה בַּעֲד֖וֹ וְנָעָֽל׃
Then Ehud went forth into the porch, and shut the doors of the upper chamber upon him, and locked them.
Rashi on Judges
And Ehud went out to the hallway. From the penthouse to the מסדרונה, translated by Targum Yonasan as 'hallway'.
Metzudat Zion on Judges
This is the portico that is arranged with chairs for people to sit in