Exodus 15:6 describes God's right hand shattering enemies; here in 15:12, that same hand stretches to swallow them.

Psalm 136:15 recounts God sweeping Pharaoh's army into the Red Sea, the same event described here as earth swallowing them.

Luke 1:51 speaks of God's arm showing strength, a parallel image to God's right hand stretching out in judgment here.