The three concepts used to express liberation for God’s people are the taking out from under the burdens, deliverance from slavery, and redemption.
To take out from under the burden is to remove the unbearable yoke. God will grant them rest from their labours, which Pharaoh does not grant them.
Israel’s deliverance from slavery will result in their becoming a free nation. The land of milk and honey lies open for them.
The third verb, to redeem,
is ga’al in Hebrew. The person who is freed is the go’el, the family member who buys back family possessions that ended up outside the family and brings them back to the family again (the kinsman-redeemer). Think of Boaz as go’el in Ruth 4:1–22.
Israel is God’s firstborn son (Exodus 4:22; compare with Romans 9:4). Now the Father liberates his child. To say it in other words, God makes his people to be his treasured possession (Exodus 19:5).
6 Say therefore to the people of Israel, ‘I am the LORD, and I will bring you out from under the burdens of the Egyptians, and I will deliver you from slavery to them, and I will redeem you with an outstretched arm and with great acts of judgment.