Daniel 7:23 (BSB)

This is what he said: ‘The fourth beast is a fourth kingdom that will appear on the earth, different from all the other kingdoms, and it will devour the whole earth, trample it down, and crush it.

From Daniel 7. Also in the ESV.

Commentary on Daniel 7:23

• John Calvin (Reformed), Calvin's Commentaries on Daniel 7:23: This reply of the angel is subject to the same obscurity as the vision itself, but it ought to be sufficient to calm the minds of the faithful to know that various changes should arise and shake the whole earth; for as many troubles were, prepared for the saints, so also they were braced up to fortitude and endurance.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Daniel 7:15-28: Here we have, I. The deep impressions which these visions made upon the prophet. God in them put honour upon him, and gave him satisfaction, yet not without a great allay of pain and perplexity (Dan 7:15): I Daniel was grieved in my spirit, in the midst of my body.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Daniel 7:23: Thus he said,.... The person that stood by, the angel, of whom Daniel made his inquiries, and who answered him, as follows: the fourth beast shall be the fourth kingdom on earth; which shows that the angel, by four kings, Dan 7:17, meant four kingdoms, that should successively arise in the earth, and out of it, one after another; and this kingdom is not the...
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on Daniel 7:23-24: Dan 7:23-24 Daniel receives the following explanation regarding the fourth beast. It signifies a fourth kingdom, which would be different from all the preceding, and would eat up and destroy the whole earth. “The whole earth is the οἰκουμένη,” the expression, without any hyperbole, for the “whole circle of the historical nations” (Kliefoth). The ten horns which the beast had signify ten kings who shall arise out of that kingdom.