John Gill Commentary 2 Kings 18:9

"And it came to pass in the fourth year of king Hezekiah, which was the seventh year of Hoshea son of Elah king of Israel, that Shalmaneser king of Assyria came up against Samaria, and besieged it." — 2 Kings 18:9 (ASV)

And it came to pass in the fourth year of King Hezekiah
In the beginning of it:

which was the seventh year of Hoshea son of Elah king of Israel :
the beginning of his seventh:

that Shalmaneser king of Assyria came up against Samaria, and besieged
it ;
see (2 Kings 17:5) .