2 Kings 20:18 - Joseph Benson’s Commentary on the Old and New Testaments

And of thy sons, &c. Thy grand-children, who are often called sons. They shall be eunuchs, &c. They shall be servants to that heathen monarch, whereby both their bodies will be subject to slavery, and their souls exposed to the peril of idolatry, and all sorts of wickedness. This was a very sore judgment, and by it God would teach the world the great evil of sin; yea, even of those sins which are generally esteemed but small or venial.