And he reared up the pillars before the temple, one on the right hand, and the other on the left; and called the name of that on the right hand Jachin, and the name of that on the left Boaz.
Here is an account of 1. The two cherubim, which were set up in the holy of holies. There were two already over the ark, which covered the mercy-seat with their wings; these were small ones. Now that the most holy place was enlarged, though these were continued (being appurtenances to the ark, which was not to be made new, as all the other utensils...
Commenting on 2 Chronicles 3:10-17
He reared up the pillars - "The name of that on the right hand was Jachin, because the kingdom of the house of David was established; and the name of the left was Boaz, from the name of Boaz the patriarch of the family of Judah, from whom all the kings of the house of Judah have descended." - Targum.
2Ch 3:17 As to the position of the pillars, and their names, see on 1Ki 7:21.