Blessed be the Lord God of Israel from everlasting to everlasting - Forever. As he has been adored in the past - even from the beginning of the creation - so let him be adored and praised in all periods to come - forever and forever. See the notes at Psalms 41:13.
And let all the people say, Amen - In Psalms 41:13, this is, “Amen and amen.” The idea is, Let all the people join in this; let them all express and declare their assent to this: let them all say, “Be it so.” The word “Amen” is a word expressing assent - meaning verily, truly, certainly.
Praise ye the Lord - Hebrew, “Hallelu-jah.” See Psalms 104:35.