Unto whom I sware in my wrath,.... Being angry with them, he sware for the confirmation of what he said; the form of the oath was, "as truly as I live"; he sware by himself, for he could swear by no greater; see Nu 14:21that they should not enter into my rest; the land of Canaan, or Israel, as Kimchi; which the Lord provided, promised, and gave to the Israelites, as their rest; the land of Israel and Jerusalem, as Jarchi; or the house of the sanctuary, the temple, as the Targum; which Jehovah chose for his rest, and took it up in it, and where he promised the Messiah, the Prince of peace, who gives to his people spiritual and eternal rest.
Canaan was typical of the rest which remains for the people of God; the use that believing Jews, and all Christians under the Gospel dispensation, are to make of this, see in Heb 3:18.