To participate in a sacrifice, one’s uncleanness needed to be removed. Consecration was required (see 1 Samuel 16:5). Here, however, there is no reason to understand the guests—the nations—as possessing any particular holiness. They have been simply chosen by God to attend this banquet to feed on Judah. A similar use of consecrate
or sanctify
is found in Isaiah 13:3 (holy ones
referring to the Babylonians). It is a divinely appointed mission that they have.
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7 Be silent before the Lord GOD! For the day of the LORD is near; the LORD has prepared a sacrifice and consecrated his guests.