Daniel 2:33 (BSB)

its legs were iron, and its feet were part iron and part clay.

From Daniel 2. Also in the ESV.

Commentary on Daniel 2:33

• John Calvin (Reformed), Calvin's Commentaries on Daniel 2:33: When he says, the feet of the image were partly of iron and partly of clay, this ought to be referred to the ruin which occurred, when God dispersed and cut in pieces, so to speak, that monarchy. The Chaldean power fell first; then the Macedonians, after subduing the East, became the sole monarchs to whom the Medes and Persians were subservient.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Daniel 2:31-45: Daniel here gives full satisfaction to Nebuchadnezzar concerning his dream and the interpretation of it. That great prince had been kind to this poor prophet in his maintenance and education; he had been brought up at the king's cost, preferred at court, and the land of his captivity had hereby been made much easier to him than to others of his brethren.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Daniel 2:33: His legs of iron,.... A coarser metal than the former, but very strong; and designs the strong and potent monarchy of the Romans, the last of the four monarchies, governed chiefly by two consuls: and was divided, in the times of Theodosius, into the eastern and western empire, which may be signified by the two legs: his feet part of iron and part of clay...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Daniel 2:33: As the two arms of silver denote the kings of the Medes and Persians [JOSEPHUS]; and the two thighs of brass the SeleucidÃ&brvbr of Syria and LagidÃ&brvbr of Egypt, the two leading sections into which GrÃ&brvbrco-Macedonia parted, so the two legs of iron signify the two Roman consuls [NEWTON].