John Gill Commentary 2 Chronicles 30:9

"For if ye turn again unto Jehovah, your brethren and your children shall find compassion before them that led them captive, and shall come again into this land: for Jehovah your God is gracious and merciful, and will not turn away his face from you, if ye return unto him." — 2 Chronicles 30:9 (ASV)

For if you turn again unto the Lord
To the fear or worship of the Lord, as the Targum:

your brethren and your children shall find compassion before them that
lead them captive, so that they shall come again into this land ;
who had been carried away by Tiglathpileser, see (Psalms 106:46) ,

for the Lord your God is gracious and merciful ;
so he had proclaimed his name, as they must know, (Exodus 34:6) ,

and will not turn away his face from you ;
in wrath and anger; or withdraw his Shecaniah from you, as the Targum; his gracious and glorious presence:

if you return unto him ;
his fear and worship, as the same paraphrase.