וַיָּחִ֣ילוּ עַד־בּ֔וֹשׁ וְהְנֵּ֛ה אֵינֶ֥נּוּ פֹתֵ֖חַ דַּלְת֣וֹת הָֽעֲלִיָּ֑ה וַיִּקְח֤וּ אֶת־הַמַּפְתֵּ֙חַ֙ וַיִּפְתָּ֔חוּ וְהִנֵּה֙ אֲדֹ֣נֵיהֶ֔ם נֹפֵ֥ל אַ֖רְצָה מֵֽת׃
And they tarried till they were ashamed; and, behold, he opened not the doors of the upper chamber; therefore they took the key, and opened them; and, behold, their lord was fallen down dead on the earth.
Rashi on Judges
A considerable time. [lit.] Until [it constituted] delay, as if to say, a considerable time.
Metzudat David on Judges
For a long time: They waited a time that was appropriate that he would be done reliving himself even if he took a while.
Metzudat Zion on Judges
They waited as in Genesis 8:10 "He waited longer"