Albert Barnes Commentary Psalms 111:1

"Praise ye Jehovah. I will give thanks unto Jehovah with my whole heart, In the council of the upright, and in the congregation." — Psalms 111:1 (ASV)

Praise ye the Lord – Margin, “Hallelujah.” See Psalms 106:1.

I will praise the Lord with my whole heart – With undivided affections, holding back nothing. I will allow nothing to be in my heart that would interfere with the fullness of praise; no coldness or dividedness of affection; no love for other things that would deaden my love for God; no suspicion respecting him that would chill my ardor; no unbelief that would drag me down to earth, while the language of my lips ascended to God. See the notes at Psalms 86:12.

In the assembly of the upright – With the righteous when they are gathered together for public worship.

And in the congregation – See Psalms 22:22, Psalms 22:25; Psalms 66:13; Psalms 89:5.