עַל־כֵּ֗ן מָלְא֤וּ מָתְנַי֙ חַלְחָלָ֔ה צִירִ֣ים אֲחָז֔וּנִי כְּצִירֵ֖י יֽוֹלֵדָ֑ה נַעֲוֵ֣יתִי מִשְּׁמֹ֔עַ נִבְהַ֖לְתִּי מֵרְאֽוֹת׃
因此我的腰間充滿戰慄；疼痛抓住了我，如同產婦的陣痛。我因所聽見的痛得蜷曲，因所看見的驚惶失措。
Rashi
my loins are filled with trembling The prophet is merciful and sighs over the retribution meted out to the nations. This is the Midrash Aggadah (Tan., beginning of Balak). According to its simple meaning, however, the prophet is reciting the lamentation and the mourning as though this were Babylonia lamenting.
Ibn Ezra
Therefore. Because I heard the cry, Go up, O Elam, I neither heard nor saw anything on account of my great fear.
Rashi
pangs (צִירִים), an expression denoting trembling and pains. And our Rabbis said: A woman has doors and hinges (צִירִים) on her womb just as the doors of a house have hinges (Bechoroth 45a).
Rashi
I became confused This is a malady known as עֲוִית, convulsions, in the language of the Sages.