4 and what he did to the army of Egypt, to their horses and to their chariots; how he made the water of the Red Sea overflow them as they pursued after you, and how the Lord has destroyed them to this day;

Matthew Henry's Commentary on Deuteronomy 11:4

Commentary on Deuteronomy 11:1-7

(Read Deuteronomy 11:1-7)

Observe the connexion of these two; Thou shalt love the Lord, and keep his charge. Love will work in obedience, and that only is acceptable obedience which flows from a principle of love, 1 John 5:3. Moses recounts some of the great and terrible works of God which their eyes had seen. What our eyes have seen, especially in our early days, should affect us, and make us better long afterwards.