2 Kings 14:5

And it cometh to pass, when the kingdom hath been strong in his hand, that he smiteth his servants, those smiting the king his father,

Genesis 9:6

whoso sheddeth man's blood, by man is his blood shed: for in the image of God hath He made man.

Exodus 21:12-14

'He who smiteth a man so that he hath died, is certainly put to death;

Numbers 35:33

And ye profane not the land which ye are in, for blood profaneth the land; as to the land, it is not pardoned for blood which is shed in it except by the blood of him who sheddeth it;

2 Kings 12:20-21

And his servants rise, and make a conspiracy, and smite Joash in the house of Millo, that is going down to Silla:

2 Chronicles 25:3-4

And it cometh to pass, when the kingdom hath been strong upon him, that he slayeth his servants, those smiting the king his father,

Treasury of Scripture Knowledge

Summary

And it came to pass, as soon as the kingdom was confirmed in his hand, that he slew his servants which had slain the king his father.

General references

Bible References

That he slew

Genesis 9:6
whoso sheddeth man's blood, by man is his blood shed: for in the image of God hath He made man.
Exodus 21:12
'He who smiteth a man so that he hath died, is certainly put to death;
Numbers 35:33
And ye profane not the land which ye are in, for blood profaneth the land; as to the land, it is not pardoned for blood which is shed in it except by the blood of him who sheddeth it;

His servants

2 Kings 12:20
And his servants rise, and make a conspiracy, and smite Joash in the house of Millo, that is going down to Silla:
2 Chronicles 25:3
And it cometh to pass, when the kingdom hath been strong upon him, that he slayeth his servants, those smiting the king his father,

General references

Deuteronomy 24:16
Fathers are not put to death for sons, and sons are not put to death for fathers -- each for his own sin, they are put to death.