Charles Ellicott Commentary Isaiah 41:3

"He pursueth them, and passeth on safely, even by a way that he had not gone with his feet." — Isaiah 41:3 (ASV)

He pursued ... —Tenses in the present, as before.

By the way that he had not gone —i.e., by a new untrodden path. So Tiglath-Pileser and other Assyrian kings continually boast that they had led their armies by paths that none had traversed before them (Records of the Past, i. 15, v. 16).