Verse 9: (Josh. 10:36; 11:21; 15:13) And afterward the children of Judah went down to fight against the Canaanites, that dwelt in the mountain, and in the south, and in the valley (or, low country).
[Going down] Thus it is said, either, because Jerusalem was in an elevated position (Vatablus); or, because they were going Southward (Drusius); or, to go down (just as also to go up) signifies only to go (Bonfrerius).
[In the mountains] Where Hebron was, verse 10 (Junius).
[And to the south] Where Debir was, verse 11, and the Kenite, and Hormah, verses 16, 17 (Junius).
[And in the plains] Which they did not go on to occupy, as in verse 19. For this whole verse is proleptic (Junius).
 Hebrew: וְאַחַ֗ר יָֽרְדוּ֙ בְּנֵ֣י יְהוּדָ֔ה לְהִלָּחֵ֖ם בַּֽכְּנַעֲנִ֑י יוֹשֵׁ֣ב הָהָ֔ר וְהַנֶּ֖גֶב וְהַשְּׁפֵלָֽה׃
 Hebrew: וְהַשְּׁפֵלָה.