Numbers 14:21

But [as truly as] I live,.... Which is the form of an oath, as the Targum; the Lord swears by his life, or by himself, because he could swear by no greater:

all the earth shall be filled with the glory of the Lord; this is not the thing sworn unto or confirmed, but that by which the oath is made and confirmed; and the sense is, that as sure as the earth "had been" filled with the glory of the Lord, as it may be rendered, as it had been with the fame of what he had done in Egypt, and at the Red sea; or as it "should be" filled with it in later times, especially in the kingdom of the Messiah in the latter day; see Isaiah 6:3; so sure the men that had provoked him should not see the land of Canaan.