The chariots of God are tens of thousands—thousands of thousands are they; the Lord is in His sanctuary as He was at Sinai.
PSALM 68 In this psalm it was David’s design to celebrate the victories which, through the blessing of God, he had gained over his enemies; As to the time and occasion of the composition of this psalm, the majority of interpreters refer it to the translation of the ark from the house of Obed-Edom to Mount Zion, and with this every part of it would, no doubt, harmonize.
Commenting on Psalm 68:1-35
The chariots of God are twenty thousand. Other countries, which in the former verse were symbolically referred to as "high hills, "gloried in their chariots of war; but Zion, though far more lowly, was stronger than they, for the omnipotence of God was to her as two myriads of chariots.
David, having given God praise for what he had done for Israel in general, as the God of Israel (Psa 68:8), here comes to give him praise as Zion's God in a special manner; compare Psa 9:11. Sing praises to the Lord who dwelleth in Zion, for which reason Zion is called the hill of God. I.
Commenting on Psalm 68:15-21