וַיַּגֵּ֤ד הַצֹּפֶה֙ לֵאמֹ֔ר בָּ֥א עַד־אֲלֵיהֶ֖ם וְלֹֽא־שָׁ֑ב וְהַמִּנְהָ֗ג כְּמִנְהַג֙ יֵה֣וּא בֶן־נִמְשִׁ֔י כִּ֥י בְשִׁגָּע֖וֹן יִנְהָֽג׃
And the watchman told, saying: ‘He came even unto them, and cometh not back; and the driving is like the driving of Jehu the son of Nimshi; for he driveth furiously.’
Read halakhic rulings (Jewish law) on II Kings 9:20: and classical halakhic sources.