Ethiopia. Put by Figure of speech Metonymy (of Subject), for Ethiopians.
stretch out her hands. Put by Figure of speech Metonymy (of Adjunct), either for bringing presents, as in Psalms 68:29, or for prayer, or for pledging loyalty with an oath.
Related Commentaries of Psalms 68:31
Psalms 68:31
31 Princes shall come out of Egypt; Ethiopia shall soon stretch out her hands unto God.