וַיָּשֻׁ֖טוּ בְּכָל־הָאָ֑רֶץ וַיָּבֹ֜אוּ מִקְצֵ֨ה תִשְׁעָ֧ה חֳדָשִׁ֛ים וְעֶשְׂרִ֥ים י֖וֹם יְרוּשָׁלִָֽם׃
So when they had gone to and fro through all the land, they came to Jerusalem at the end of nine months and twenty days.
Read halakhic rulings (Jewish law) on II Samuel 24:8 from the Mishneh Torah and classical halakhic sources, free online.