John Gill Commentary 2 Kings 22:19

"because thy heart was tender, and thou didst humble thyself before Jehovah, when thou heardest what I spake against this place, and against the inhabitants thereof, that they should become a desolation and a curse, and hast rent thy clothes, and wept before me; I also have heard thee, saith Jehovah." — 2 Kings 22:19 (ASV)

Because thine heart was tender
Soft like wax, and susceptible of impressions; or was "moved", or "trembled", as the Targum; for God has respect to such as are of contrite hearts, and tremble at his word, (Isaiah 66:2) ,

and thou hast humbled thyself before the Lord ;
external humiliation, such as in Ahab, was regarded by the Lord, much more internal and cordial humiliation is regarded by him, see (1 Kings 21:29) ,

when thou heardest what I spoke against this place, and against the
inhabitants thereof, that they should become a desolation and a curse ;
as in (Leviticus 26:1) (Deuteronomy 28:1)

and hast rent thy clothes, and wept before me ;
as expressive of the inward contrition, sorrow, and grief of his heart:

I also have heard thee, saith the Lord :
his cries and prayers.