John Gill Commentary Psalms 114:5

"What aileth thee, O thou sea, that thou fleest? Thou Jordan, that thou turnest back?" — Psalms 114:5 (ASV)

What ailed you, O you sea, that you fleddest ?
&c.] What was the matter with you? what appeared to you? what did you see? what did you feel, which caused you to flee in such haste?

You Jordan, that you were driven back ?
what is the meaning that you did not continue to flow as usual? what was it that stopped your flowing tide? that cut off your waters? that drove them back as fast or faster than they came?