All the land - The second invasion of Shalmaneser (723 B.C., his fifth year), is here contrasted with the first, as extending to the whole country, whereas the first had afflicted only a part.

Three years - From the fourth to the sixth of Hezekiah, and from the seventh to the ninth of Heshea; two years, therefore, according to our reckoning, but three, according to that of the Hebrews. This was a long time for so small a place to resist the Assyrians but Samaria was favorably situated on a steep hill; probably Sabaco made some attempts to relieve his vassal; the war with Tyre must have distracted Shalmaneser; and there is reason to believe that before the capture was effected a revolt had broken out at Nineveh which must have claimed Shalmaneser's chief attention, though it did not induce him to abandon his enterprise.

Besieged it three years - It must have been well fortified, well provisioned, and well defended, to have held out so long.

Then the king of Assyria came up throughout all the land,.... Of Israel, there being none to oppose his march; Hoshea not daring to come out, and meet him and fight him:

and went up to Samaria, and besieged it three years; so long the city held out against him, see 2 Kings 18:9.

Then the king of Assyria came up throughout all the land, and went up to Samaria, and besieged it three years.

17:1-6 When the measure of sin is filled up, the Lord will forbear no longer. The inhabitants of Samaria must have endured great affliction. Some of the poor Israelites were left in the land. Those who were carried captives to a great distance, were mostly lost among the nations.