Melachim Bais 14:5

5 And it came to pass, as soon as the mamlakhah was chazakah in his yad, that he executed his avadim which had slain HaMelech aviv [Yoash, See 2Kgs 12:20-21].

Melachim Bais 14:5 Meaning and Commentary

2 Kings 14:5

And it came to pass, as soon as the kingdom was strengthened in
his hand
That he was well settled on the throne, and had a share in the affection of the people, and the idolatry and murder his father had committed were worn off of the minds of the people, and the friends of the conspirators against him were become few or none:

that he slew his servants that had slain the king his father;
charged them with the murder in a court of judicature, obtained a sentence against them, and had them executed.

Melachim Bais 14:5 In-Context

3 And he did that which was yashar in the eyes of Hashem, yet not like Dovid aviv; he did according to all things as Yoash aviv did.

4 Howbeit the [idolatrous] high places were not taken away; as yet HaAm did offer zevakhim and burn ketoret on the high places.

5 And it came to pass, as soon as the mamlakhah was chazakah in his yad, that he executed his avadim which had slain HaMelech aviv [Yoash, See 2Kgs 12:20-21].

6 But the banim of the makkim (assassins, murderers) he slaughtered not; according unto that which is written in the Sefer Torat Moshe, wherein Hashem commanded, saying, The avot shall not be put to death for the banim, nor the banim be put to death for the avot; but every ish shall be put to death for his own chet (sin) [Dt. 24:16].

7 He struck down Edom in the Gey HaMelach 10,000, and took Selah [Petra] in milchamah (battle), and called the shem of it Yokte’el unto this day.