To take possession of it - The goods of traitors appear to have been forfeited to the crown by the Jewish law as they still are almost universally throughout the East. Compare 2 Samuel 16:4.

And it came to pass, when Ahab heard that Naboth was dead,.... Of which he was informed by Jezebel:

that Ahab rose up to go down to the vineyard of Naboth the Jezreelite, to take possession of it; if it was in Jezreel, that was sixteen miles from Samaria, and lay lower than that, in a valley, and therefore he is said to go down to it; and which he did very likely in great state and pomp, many of his nobles and captains accompanying him, as we read that Jehu and Bidkar did ride after him at this time, 2 Kings 9:25.

But when Ahab went down to Jezreel to take possession of the vineyard of Naboth, Elijah came to meet him by the command of God, with the word of the Lord, "Hast thou murdered and also taken possession?" The question served to sharpen his conscience, since Ahab was obliged to admit the fact. בּשׁמרון אשׁר means "who lives at Samaria," for when Elijah came to meet him, Ahab was in Jezreel, Elijah then said to him still further: "Thus saith the Lord: In the place where the dogs have licked the blood of Naboth, will they also lick thine, yea, thy blood." אתּה גּם serves as an emphatic repetition of the suffix (cf. Ges. 121, 3). This threat was only so far fulfilled upon Ahab, from the compassion of God, and in consequence of his humbling himself under the divine judgment (1 Kings 21:27-29), that dogs licked his blood at Samaria when the carriage was washed in which he had died (1 Kings 22:38); but it was literally fulfilled in the case of his son Joram, whose corpse was cast into Naboth's piece of ground (2 Kings 9:25-26).

And it came to pass, when Ahab heard that Naboth was dead, that Ahab rose up to go down to the vineyard of Naboth the Jezreelite, to take possession of it.

16. Ahab rose up to go down-from Samaria to Jezreel.

21:5-16 When, instead of a help meet, a man has an agent for Satan, in the form of an artful, unprincipled, yet beloved wife, fatal effects may be expected. Never were more wicked orders given by any prince, than those Jezebel sent to the rulers of Jezreel. Naboth must be murdered under colour of religion. There is no wickedness so vile, so horrid, but religion has sometimes been made a cover for it. Also, it must be done under colour of justice, and with the formalities of legal process. Let us, from this sad story, be amazed at the wickedness of the wicked, and the power of Satan in the children of disobedience. Let us commit the keeping of our lives and comforts to God, for innocence will not always be our security; and let us rejoice in the knowledge that all will be set to rights in the great day.