1 Kings 11:37 - Joseph Benson’s Commentary on the Old and New Testaments

I will take thee From the condition wherein thou art, and place thee on a throne, as here follows. Thou shalt reign according to all thy soul desireth According to thy utmost wishes and desires. It appears from this that he was a very aspiring and ambitious man, fond of power and pre-eminence; and it is not unlikely but he might at this time be plotting against Solomon, and contriving to rise to the throne. The Jews say, that when he was employed by Solomon in repairing and building Millo, as the expenses attending the work were very great, he took opportunities of reflecting upon Solomon as oppressive to his people, and of suggesting that which he thought would alienate them from his government, and infuse a spirit of sedition and revolt. He complained heavily, especially to his brethren of the tribe of Ephraim, “of the hard labour to which they were forced to submit, and the taxes they were obliged to pay; and to represent the whole affair as a work of vanity, merely to gratify a proud foreign woman, and a silly, doting king; for Solomon filled up a part of the valley of Millo to build a palace for Pharaoh's daughter. By these insinuations, it is thought, Jeroboam wrought in the people a disaffection to Solomon and his government.” See Calmet's Dict. under the word MILLO.