Isaiah 14:7

The whole earth is at rest, [and] is quiet,.... The troubler of them being gone; and which will be the ease of the people of God, who in the latter day will fill the face of the earth, when the beast and false prophet will be taken and cast alive into the lake of fire; and especially when Satan shall be bound, and put in prison for a thousand years, that he may deceive the nations no more, Revelation 19:20:

they break forth into singing; that is, the inhabitants of the earth, because of the fall of the king of Babylon, they being delivered from so great a tyrant or oppressor; or, "utter a song of praise", as the Targum, Aben Ezra says the word in the Arabic language is expressive of "clearness", and so it does signify to speak purely, dearly, and fluently, with open, mouth, and a clear voice z; it is rendered in Psalms 98:4 "make a loud noise"; by singing a joyful song; and such a song will be sung by the church, when the mystical Babylon is fallen; see Revelation 15:2.

z "perspicuo, puriore sermone fuit, fluida oratione disertas fuit, ----diserte, eleganter locutus est", Castel. col. 3040.