Daniel 4:34 (BSB)

But at the end of those days I, Nebuchadnezzar, looked up to heaven, and my sanity was restored to me. Then I praised the Most High, and I honored and glorified Him who lives forever: “For His dominion is an everlasting dominion, and His kingdom endures from generation to generation.

From Daniel 4. Also in the ESV.

Commentary on Daniel 4:34

• John Calvin (Reformed), Calvin's Commentaries on Daniel 4:34: The Prophet again introduces King Nebuchadnezzar as the speaker. He says, then, After that time had elapsed, he raised his eyes to heaven Without doubt, he means those seven years. As to his then beginning to raise his eyes to heaven, this shews how long it takes to cure pride, the disease under which he labored.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Daniel 4:34-37: We have here Nebuchadnezzar's recovery from his distraction, and his return to his right mind, at the end of the days prefixed, that is, of the seven years. So long he continued a monument of God's justice and a trophy of his victory over the children of pride, and he was made more so by being struck mad than if he had been in an...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Daniel 4:34: Now I Nebuchadnezzar praise and extol and honour the King of heaven,.... Now he knew that the heavens ruled, and that there was a God and a King there, above all gods and kings; who had brought him low, and raised him up again, and to whom were owing all his present glory and magnificence, and therefore worthy of his highest praises; and which he...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Daniel 4:34: lifted up mine eyes unto heaven--whence the "voice" had issued (Dan 4:31) at the beginning of his visitation. Sudden mental derangement often has the effect of annihilating the whole interval, so that, when reason returns, the patient remembers only the event that immediately preceded his insanity.