Charles Ellicott Commentary Psalms 150:1

"Praise ye Jehovah. Praise God in his sanctuary: Praise him in the firmament of his power." — Psalms 150:1 (ASV)

Sanctuary— That is, the temple. Some take it in direct parallelism with firmament, and understand the “heavenly palace,” or “Temple” ; but, as in Psalms 148:0, the invocation to praise includes heaven and earth; so here, but in the reverse order, the earthly sanctuary first, and the sublime things done on earth (Psalms 150:2), then heaven and the exalted greatness there.