In Psa 106:48, we read:
Blessed be the Lord God of Israel from everlasting to
everlasting: and let all the people say, Amen. Praise ye the Lord.
The Hebrew
reads מִן־הָ֤עוֹלָ֙ם׀ וְעַ֬ד הָעוֹלָ֗ם. The LXX reads απο του αιωνος και εως
του αιωνος (alt. εις τον αιωνα). This is a text that parallels 1 Chron 16:36, where God is praised/blessed forever, but it has a starting point! For more, see the articles at:
