in saecula saeculorum

[ in sahy-koo-lah sahy-koo-loh-roo m; English in sek-yuh-luh sek-yuh-lawr-uh m, -lohr- ]
/ ɪn ˈsaɪ kʊˌlɑ ˌsaɪ kʊˈloʊ rʊm; English ɪn ˈsɛk yə lə ˌsɛk yəˈlɔr əm, -ˈloʊr- /

adverb Latin.

for ever and ever.

Origin of in saecula saeculorum

literally, for ages of ages