Psalms 65:6 - Clarke's commentary and critical notes on the Bible

Which by his strength setteth fast the mountains; being girded with power: Setteth fast the mountains - It is by thy strength they have been raised, and by thy power they are girded about or preserved. He represents the mountains as being formed and pitched into their proper places by the mighty hand of God; and shows that they are preserved from splitting, falling down, or mouldering away, as it were, by a girdle by which they are surrounded. The image is very fine. They were hooped about by the Divine power.