And Jehoash did that which was right in the sight of the LORD all his days wherein Jehoiada the priest instructed him.

And Joas did that which was right before the Lord all the days that Joiada the priest taught him.

and Jehoash doth that which is right in the eyes of Jehovah all his days in which Jehoiada the priest directed him,

Jehoash did what was right in the eyes of the Lord all his days, because he was guided by the teaching of Jehoiada the priest.

And Jehoash did what was right in the sight of the Lord, during all the days that Jehoiada, the priest, taught him.

All his days - i. e., so long as Jehoiada was his adviser" (compare 2-Chronicles 24:15-22). Jehoida was, practically speaking, regent during the minority of Jehoash, i. e., 10 or 12 years. An increase of power to the priestly order was the natural consequence. Jehoiada bore the title of "high priest" 2-Kings 12:10, which had been dropped since the time of Eleazar Joshua 20:6, and the Levitical order from this time became more mixed up with public affairs and possessed greater influence than previously. Jehoiada's successors traced their office to him rather than to Aaron Jeremiah 29:26.

Jehoash did - right in the sight of the Lord - While Jehoiada the priest, who was a pious, holy man, lived, Jehoash walked uprightly; but it appears from 2-Chronicles 24:17, 2-Chronicles 24:18, that he departed from the worship of the true God after the death of this eminent high priest, lapsed into idolatry, and seems to have had a share in the murder of Zechariah, who testified against his transgressions, and those of the princes of Judah. See above, 2-Kings 11:20-21 (note).
O how few of the few who begin to live to God continue unto the end!

And Jehoash did [that which was] right in the sight of the LORD all his days wherein (a) Jehoiada the priest instructed him.
(a) As long as rulers give ear to the true ministers of God, they prosper.

And Jehoash did that which was right in the sight of the Lord all his days,.... Worshipping the only true God, and ruling and walking according to the law of God:
wherein Jehoiada the priest instructed him; and so long as he observed his instructions, and as long as that priest lived, he reigned well; for to that period "all his days must be limited"; for after his death he was seduced by the princes of Judah to idolatry, and lived scandalously, and died ignominiously; see 2-Chronicles 24:2.

JEHOASH REIGNS WELL WHILE JEHOIADA LIVED. (2Ki. 12:1-18)
Jehoash did that which was right in the sight of the Lord--so far as related to his outward actions and the policy of his government. But it is evident from the sequel of his history that the rectitude of his administration was owing more to the salutary influence of his preserver and tutor, Jehoiada, than to the honest and sincere dictates of his own mind.

(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 2-Kings 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 him before he began to reign, but he instructed him after he had been raised to the throne at the age of seven years, that is to say, so long as Jehoiada himself lived. The יהוידע כּל־ימי of the Chronicles is therefore a correct explanation. But after Jehoiada's death, Joash yielded to the petitions of the princes of Judah that he would assent to their worshipping idols, and at length went so far as to stone the son of his benefactor, the prophet Zechariah, on account of his candid reproof of this apostasy (2-Chronicles 24:17-22).