Matthew Henry on 2 Kings 12:1-3
The general account here given of Joash is, 1. That he reigned forty years. As he began his reign when he was very young, he might, in the course of nature, have continued much longer, for he was cut off when he was but forty-seven years old, Kg2 12:1. 2. That he did that which was right as long as Jehoiada lived to instruct him, Kg2 12:2. Many young men have come too soon to an estate - have had wealth, and power, and liberty, before they knew how to use them - and it has been of bad consequence to them; but against this danger Joash was well guarded by having such a good director as Jehoiada was, so wise, and experienced, and faithful to him, and by having so much wisdom as to hearken to h…
Read the whole note in the consoleJohn Gill on 2 Kings 12:1
In the seventh year of Jehu Jehoash began to reign,.... So that he reigned twenty one or twenty two years contemporary with Jehu's reign, for Jehu reigned twenty eight years:
and forty years reigned he in Jerusalem; the same number of years David and Solomon reigned:
and his mother's name was Zibiah of Beersheba; a city in the tribe of Simeon, in the extreme part of the land of Canaan southward; her name in the Chaldee dialect is Tabitha, the same with Dorcas in Greek, Acts 9:36.
Keil & Delitzsch on 2 Kings 12:1-3
(1-5). Reign of Joash. - Kg2 12:1 (1, 2). His age on ascending the throne, viz., seven years (cf. Kg2 11:4). - Commencement and length of his reign. His mother's name was Zibiah of Beersheba.
Kg2 12:2
(3). Joash did that which was right in the eyes of the Lord וגו אשׁר כּל־ימין, "all his days that," etc., i.e., during the whole period of his life that Jehoiada instructed him (for אשׁר after substantives indicating time, place, and mode, see Ewald, 331, c., 3; and for the use of the suffix attached to the noun defined by וגו אשׁר, compare Kg2 13:14); not "all his life long, because Jehoiada had instructed him," although the Athnach under ימין favours this view. For Jehoiada had not instructed…
Read the whole note in the consoleTyndale Open Study Notes