Exodus 34:10

10 "And he said, Behold, I make a covenant: before all thy people I will do marvels, such as have not been done in all the earth, nor in any nation: and all the people among which thou art shall see the work of the LORD: for it is a terrible thing that I will do with thee.
11 Observe thou that which I command thee this day: behold, I drive out the before thee the Amorite and the Hittite, and the Perizite, and the Hivite, and the Jebusite."

Exodus 30 - 40

Marvels 6381 pala' (paw-law');

a primitive root; properly, perhaps to separate, i.e. distinguish (literally or figuratively); by implication, to be (causatively, make) great, difficult, wonderful:

KJV-- accomplish, (arise ... too, be too) hard, hidden, things too high, (be, do, do a, shew) marvelous (-ly, -els, things, work), miracles, perform, separate, make singular, (be, great, make) wonderful (-ers, -ly, things, works), wondrous (things, works, -ly).

Theological Wordbook of the Old Testament, p 723:

Preponderantly both the verb and substantive refer to the acts of God, designating either cosmic wonders or historical achievements on behalf of Israel.