וַיִּקְרָא־ל֥וֹ בַיּוֹם־הַה֖וּא יְרֻבַּ֣עַל לֵאמֹ֑ר יָ֤רֶב בּוֹ֙ הַבַּ֔עַל כִּ֥י נָתַ֖ץ אֶֽת־מִזְבְּחֽוֹ׃ (פ)
Therefore on that day he was called Jerubbaal, saying: ‘Let Baal contend against him, because he hath broken down his altar.’
Read kabbalistic (mystical) interpretation of Judges 6:32: and classical mystical sources.