וַיְהִי֩ בִשְׁנַ֨ת הַתְּשִׁיעִ֜ית לְמָלְכ֗וֹ בַּחֹ֣דֶשׁ הָעֲשִׂירִי֮ בֶּעָשׂ֣וֹר לַחֹדֶשׁ֒ בָּ֠א נְבֻכַדְנֶאצַּ֨ר מֶֽלֶךְ־בָּבֶ֜ל ה֧וּא וְכָל־חֵיל֛וֹ עַל־יְרוּשָׁלִַ֖ם וַיִּ֣חַן עָלֶ֑יהָ וַיִּבְנ֥וּ עָלֶ֖יהָ דָּיֵ֥ק סָבִֽיב׃
And it came to pass in the ninth year of his reign, in the tenth month, in the tenth day of the month, that Nebuchadnezzar king of Babylon came, he and all his army, against Jerusalem, and encamped against it; and they built forts against it round about.
Rashi on II Kings
In the ninth year of his reign. Of Tzidkiyohu.1Which corresponds to Nevuchadnetzar's seventeenth year.—Radak
Ralbag on II Kings
they built forts against it round about: These are towers that they built around the city to conquer it.
Rashi on II Kings
Siege towers. [Targum Yonoson] rendered כרקום [=works of siege].