The origin of Amalek we find in Genesis 14:7. Observe Amalek is the first of the nations to oppose God's people, and remark his latter end; Numbers 24:20. Is not this also to be spiritually considered? Amalek is of the seed of Esau, in whom there is a natural hatred. Galatians 4:29.
Related Commentaries of Exodus 17:8
Exodus 17:8
8 Then came Amalek, and fought with Israel in Rephidim.