Charles Ellicott Commentary Psalms 98:8

"Let the floods clap their hands; Let the hills sing for joy together" — Psalms 98:8 (ASV)

Clap their hands. —This expression, descriptive of the lapping sound of waves, occurs also in Isaiah 55:12.

Let the hills be joyful together. —

“Far along,
From peak to peak, the rattling crags among,
Leaps the live thunder! Not from one long cloud,
But every mountain now has found a tongue,
And Jura answers through her misty shroud
Back to the joyous Alps who call to her aloud.”
BYRON: Childe Harold, canto iii.