וַיִּֽהְי֣וּ הֶעָרִ֗ים מִקְצֵה֙ לְמַטֵּ֣ה בְנֵֽי־יְהוּדָ֔ה אֶל־גְּב֥וּל אֱד֖וֹם בַּנֶּ֑גְבָּה קַבְצְאֵ֥ל וְעֵ֖דֶר וְיָגֽוּר׃
E le città all'estremità della tribù dei figli di Giuda, verso il confine di Edom, nel sud, erano: Kabtseel, Eder e Iagur;
Rashi
And Edom rebelled Was it not already stated above (verse 8): “In his days, Edom rebelled?” But this is the manner of Scripture: because a verse is interposed, and it now wishes to continue with “then Libnah rebelled,” it repeats the [original words] stating, “And Edom rebelled.” then Libnah rebelled It belonged to Judah, and it was situated on the border of Edom, as is written in the Book of Joshua (15:21, 42): “And the outermost cities of the tribe of the children of Judah toward the border of Edom.” When they saw that the Edomites rebelled, they too rebelled, for they lived on the border of Edom, and they aided Edom. This is [the meaning of] “then Libnah rebelled.”
Rashi
Livnoh rebelled. The inhabitants of Livnoh rebelled, and they rebelled against the king. I do not know from what nation they were, because Livnoh is part of Eretz Yisroel.25Livnoh is listed as one of Yehudah’s cities that were located at the southern extremity of Yehudah’s territory at Edom’s border. See Yehoshua 15:21, 42. But I say that they were of the tribe of Yehudah and they rebelled against the king.26Alternatively, Livnoh was an Edomite town close to the border, but at first did not join in the rebellion with the rest of Edom. However, after the war, Livnoh joined the Edomite rebellion.—Radak