25. When they were departed. Joash kept the invading army of Syrians from sacking Jerusalem itself by sending Hazael the treasures of both Temple and palace (2 Kings 12:18).
Great diseases. Joash had probably been seriously wounded by the Syrians.
Sons of Jehoiada. It seems that other sons of Jehoiada may have been involved in the fate of Zechariah.
Slew him on his bed. This was in the house of Millo (2 Kings 12:20). Millo was probably a strong fortified area in the City of David. David (2 Sam. 5:9; 1 Chron. 11:8) and Solomon (1 Kings 11:27) had worked on Millo.
Sepulchres of the kings. Joash, who had begun his reign with such great promise, was refused the honor of burial in the royal sepulchers. Compare 21:20, which states that Jehoram likewise was refused burial in the sepulchers of the kings because of his evil deeds.