Explanatory Notes on the Whole Bible, by John Wesley, [1754-65], at sacred-texts.com
4 Kings (2 Kings) 12:3
kg2 12:3Burnt incense - To the true God.
4 Kings (2 Kings) 12:4
kg2 12:4And Jehoash said, &c. - Remembering that he owed his preservation and restoration to the temple, and that he was made by God the guardian of his temple, he now takes care to repair it. Dedicated things - The money which had been either formerly or lately vowed or dedicated to the service of God and of his house. That is brought - Or rather, that shall be brought: for though the people might vow to bring it thither in convenient time, yet it is not likely they would bring much money thither in the tyrannical and idolatrous reign of Athaliah. The money - The half shekel, which was paid for every one that was numbered from twenty years old and upward. Is set at - Heb. the money of souls, or persons according to his taxing, the money which every man that had vowed his person to God, paid according to the rate which the priest put upon him. That cometh - All that shall be freely offered.
4 Kings (2 Kings) 12:15
kg2 12:15Faithfully - For they perceived by many experiments that they were faithful.
4 Kings (2 Kings) 12:20
kg2 12:20And slew Joash - We are told, in the Chronicles, that his murdering the prophet, Jehoiada's son, was the provocation. In this, how unrighteous so ever they were, yet the Lord was righteous. And this was not the only time, that he let even kings know, it was at their peril, if they touched his anointed, or did his prophets any harm. Thus fell Joash, who began in the spirit, and ended in the flesh. And indeed God usually sets marks of his displeasure upon apostates, even in this life.