The right land, viz. the strength and power that God gave to Moses, expressed by the right hand, that being usually esteemed the stronger, Psalms 16:8, Psalms 20:6. Or, the rod in his right hand; by which understand also all the wonders that he did for them in Egypt. With his glorious arm; or that arm wherewith God gained to himself so much glory, being always present at the assistance of Moses, Deuteronomy 4:34: or Moses's right hand, led by God's glorious arm, as parents lead their children, that God may have all the glory in the using of his instruments. Dividing the water; the Red Sea, Exodus 14:21, and also Jordan, Joshua 3:15,16. To make himself an everlasting name; with reference both to his power and providence, as respecting either his aim and end in doing what he did, or the effect of it when it was done, it got him renown.
Related Commentaries of Isaiah 63:12
Isaiah 63:12
12 That led them by the right hand of Moses with his glorious arm, dividing the water before them, to make himself an everlasting name?