John Gill Commentary 2 Chronicles 28:13

"and said unto them, Ye shall not bring in the captives hither: for ye purpose that which will bring upon us a trespass against Jehovah, to add unto our sins and to our trespass; for our trespass is great, and there is fierce wrath against Israel." — 2 Chronicles 28:13 (ASV)

And said unto them, you shall not bring in the captives hither ,

&c.] That is, into Samaria, near which it seems they now were:

for whereas we have offended against the Lord already ;

by exceeding in their cruelty against their brethren of Judah, as well as by worshipping the calves:

you intend to add more to our sins and to our trespass :

by making slaves of those they had taken captives, which was against the express law of God:

for your trespass is great ;

which they had committed already, by their idolatrous practices:

and there is fierce wrath against Israel ;

which they perceived by what the prophet had said.