Albert Barnes Commentary Psalms 135:1

"Praise ye Jehovah. Praise ye the name of Jehovah; Praise [him], O ye servants of Jehovah," — Psalms 135:1 (ASV)

Praise ye the Lord — Hebrew, Hallelu-jah. Literally, “Praise Jah,” an abridged name for Yahweh. See the notes at Psalms 68:4.

Praise ye the name of the Lord — The same as praising God himself.

Praise him, O ye servants of the Lord — You who are especially designated or appointed to this service (Psalms 134:1).