16 He said, “Because hands were lifted up againsta the throne of the LORD,b the LORD will be at war against the Amalekites from generation to generation.”

Read Exodus 17:16 Using Other Translations

For he said, Because the LORD hath sworn that the LORD will have war with Amalek from generation to generation.
saying, "A hand upon the throne of the LORD! The LORD will have war with Amalek from generation to generation."
He said, “They have raised their fist against the LORD ’s throne, so now the LORD will be at war with Amalek generation after generation.”