Obadiah

Do you remember Jacob, son of Isaac? 

A dodgy character of note, but GOD chose to use him anyway, and renamed him Israel.
Well, he had a brother, as you may recall. His brother Esau, was also renamed. He was called Edom. 

Isaac prophesied that Edom's descendants (Edomites) would always be at war with Israel's (Israelites) which in fact happened for hundreds of years.

After Edom took part in the ransacking of Jerusalem in the Babylonian invasion, GOD sent Obadiah to pass judgment on them...

OBADIAH
Curse not God’s chosen!
For the Lord will cut you off.
An end for Edom?

God promised in Genesis to bless those that bless His people, and curse those who curse them.
And He is faithful, even after all this time.

Never forget, that God keeps His promises.