In a church service earlier this year, I sang LSB #956 "Create in Me" (a setting of Psalm 51:10-12), and I noticed a small feature in LSB #957 "Our Father Who Are in Heaven" (a setting of the Lord's Prayer) on the opposite page. "Forever and ever" is sung to this musical phrase (no title for the tune is provided):
"Ever" is sung with a melisma (G F F), and because the word is stretched out, there's something of a sense of the long period of time it describes.