Deuteronomy 5 - 7

Moses reminds the people that they themselves were witness to the awesome presence of God at Mt Horeb, and they all heard His voice, restating His commandments to the nation.

The greatest commandment in all of the Bible…

Hear, O Israel! The LORD is our God, the LORD is one! You shall love the LORD your God with all your heart and with all your soul and with all your might. Remember these Words. Teach them to your children and their children. In the future, when you are blessed in great prosperity in the land, do not forget them.
- Deuteronomy 6:4-5

The Lord promises great blessings upon Israel in the land He will take them to, but they must not assimilate with the people in that land, and they must remain faithful to all of God’s commands, or He will bring judgement on them.