Remember that you were slaves in Egypt and the LORD your God redeemed you from there. That is why I command you to do this.
NIV
But you shall [earnestly] remember that you were a slave in Egypt and the Lord your God redeemed you from there; therefore I command you to do this.
AMP
But thou shalt remember that thou wast a bondman in Egypt, and the LORD thy God redeemed thee thence: therefore I command thee to do this thing.
KJV