'Forever' in the Bible

Then Abner called out to Joab, "Must the sword devour forever? Don't you realize that this will turn bitter in the end? When will you tell the people to turn aside from pursuing their brothers?"

When David later heard about this, he said, "I and my kingdom are forever innocent before the Lord of the shed blood of Abner son of Ner!

He gives his chosen king magnificent victories; he is faithful to his chosen ruler, to David and to his descendants forever!"