Cush will come to Zion with a tribute (Isaiah 18:7)

In this chapter, 18:1-2, 4-6 is identified as the original poem against Cush inherited by the supposed late-exilic redactor who added v 7 at the end of the poem. Verse 3 was originally a marginal note on 17:12-14 written in the post-exilic period which was mistakenly copied into the verse’s current position. The only intentional secondary addition made to the original oracle against Cush is v 7 where one finds some points of contact with chs 40-55. Verse 7 foretells that the Cushites who were stricken by YHWH in the past will one day acknowledge his sovereignty and bring tributary gifts to Zion. The future restoration of a once afflicted people, their journey to Zion, and various connections with chs 40-55 all suggest that 18:7 is a continuation of the same vision first set out in 14:1-2.