Commentary for Judges 12:1

וַיִּצָּעֵק֙ אִ֣ישׁ אֶפְרַ֔יִם וַֽיַּעֲבֹ֖ר צָפ֑וֹנָה וַיֹּאמְר֨וּ לְיִפְתָּ֜ח מַדּ֣וּעַ ׀ עָבַ֣רְתָּ ׀ לְהִלָּחֵ֣ם בִּבְנֵי־עַמּ֗וֹן וְלָ֙נוּ֙ לֹ֤א קָרָ֙אתָ֙ לָלֶ֣כֶת עִמָּ֔ךְ בֵּיתְךָ֕ נִשְׂרֹ֥ף עָלֶ֖יךָ בָּאֵֽשׁ׃

And the men of Ephraim were gathered together, and passed to Zaphon; and they said unto Jephthah: ‘Wherefore didst thou pass over to fight against the children of Ammon, and didst not call us to go with thee? we will burn thy house upon thee with fire.’

Rashi on Judges