הִתְנַעֲרִ֧י מֵעָפָ֛ר ק֥וּמִי שְּׁבִ֖י יְרֽוּשָׁלִָ֑ם התפתחו [הִֽתְפַּתְּחִי֙] מוֹסְרֵ֣י צַוָּארֵ֔ךְ שְׁבִיָּ֖ה בַּת־צִיּֽוֹן׃ (ס)
Shake thyself from the dust; Arise, and sit down, O Jerusalem; Loose thyself from the bands of thy neck, O captive daughter of Zion.
Rashi
Shake yourself Heb. הִתְנַעֲרִי, escourre in O.F., to shake strongly, like one who shakes out a garment.
Ibn Ezra
Shake thyself from the dust. It is a figurative expression. The prophet therefore4The word therefore does not refer to the remark immediately preceding, but to the words of the text, Shake thyself from the dust, which imply, that she was lying in the dust.—The words sit down are to be contrasted with the lying in dust. continues, Arise, sit down; for Jerusalem is compared to one that has been lying down in dust.
Rashi
arise from the ground, from the decree (supra 3:26), “She shall sit on the ground.”