for I will work
Verse 5 (Habakkuk 1:5) anticipates the dispersion "among the nations".
Compare (Deuteronomy 28:64-67).
While Israel as a nation is thus dispersed, Jehovah will "work a work" which Israel "will not believe." (Acts 13:37-41); interprets this prediction of the redemptive work of Christ. It is significant that Paul quotes this to Jews of the dispersion in the synagogue at Antioch.