כַּאֲשֶׁ֥ר הֹגָ֖ה מִן־הַֽמְסִלָּ֑ה עָבַ֤ר כָּל־אִישׁ֙ אַחֲרֵ֣י יוֹאָ֔ב לִרְדֹּ֕ף אַחֲרֵ֖י שֶׁ֥בַע בֶּן־בִּכְרִֽי׃
When he was removed out of the highway, all the people went on after Joab, to pursue after Sheba the son of Bichri.
Read midrashic interpretation of II Samuel 20:13: and classical rabbinic exegesis.