Charles Ellicott Commentary Acts 7:35

"This Moses whom they refused, saying, Who made thee a ruler and a judge? him hath God sent [to be] both a ruler and a deliverer with the hand of the angel that appeared to him in the bush." — Acts 7:35 (ASV)

The same did God send to be a ruler and a deliverer.—Literally, a ruler and redeemer. The word is not found elsewhere in the New Testament, but is formed from the noun for “ransom” in Matthew 20:28, Mark 10:45, and appears to have been chosen to emphasize the parallelism which the speech indicates between Moses and Christ. In a yet higher sense than Moses, the latter also had been made “a ruler and a redeemer.”