Psalm 46

Mountains falling into the sea, nations raging, kingdoms crumbling, and in the middle of it a quiet river making God's city glad. "Be still" isn't advice about calm feelings. It's God speaking to the nations and to us: stop, let go, and know who is God. The refrain says it twice: the LORD of Hosts is with us.

"“Be still and know that I am God; I will be exalted among the nations, I will be exalted over the earth.”" (Psalm 46:10)

Versions/Hebrew: "Be still" in 46:10 is harpu [7503], let go, let drop, slacken your hands. YLT: "Desist." It means releasing your grip more than staying motionless.