Jamieson, Fausset and Brown on Psalms 68:4

4. extol him ... heavens--literally, "cast up for Him who rideth in the deserts," or "wilderness" (compare Psa 68:7), alluding to the poetical representation of His leading His people in the wilderness as a conqueror, before whom a way is to be prepared, or "cast up" (compare Is 40:3; 62:10).

by his name JAH--or, "Jehovah," of which it is a contraction (Ex 15:3; Is 12:2) (Hebrew).

name--or, "perfections" (Psa 9:10; 20:1), which--