Psalms 77:18

In the heavens. — Literally, in the vault. The Hebrew, galgal, from gâlal, “to roll,” has the same derivation as “vault” (volutum, from volvo). It is strange that this rendering, which so well suits the parallelism, should have been set aside by modern scholars in favour of “whirlwind” or “rolling chariot wheels.” The LXX. and Vulg. have “wheel,” but possibly with reference to the apparent revolution of the sky. The word, where it occurs in Isaiah 17:13, means something rolled by the whirlwind, not the whirlwind itself.