Matthew Poole and continuators on Psalms 41:13

13. Blessed be the LORD God of Israel, from everlasting, and to everlasting Amen and amen .

Or, from Age to Age, as long as the World lasts, and to all Eternity.

Amen signifies an hearty Assent, and Approbation, and withal an earnest Desire, and Confidence of the thing, to which it is annexed. And as the Psalms are divided into five Books, so each of them is closed with this Word, the first here; The second, Psal. 72. the third, Psal. 89. the fourth, Psal. 106. the last in the end of Psal. 150. the doubling of the[illegible: 1+ letters] word shews the Fervency of his Spirit, in this Work of praising God.