Albert Barnes Commentary Psalms 71:8

"My mouth shall be filled with thy praise, And with thy honor all the day." — Psalms 71:8 (ASV)

Let my mouth be filled - This is an appeal to himself, in view of the goodness of God, to praise Him always. See the notes at (Psalms 35:28).

With thy praise - With the expressions of praise.

And with thy honor all the day - With such expressions as will promote your glory, and make your honor known.