Moses
Deuteronomy 6:21ESV·traditional attribution

then you shall say to your son, ‘We were Pharaoh’s slaves in Egypt. And the LORD brought us out of Egypt with a mighty hand.

Matthew Henry Presbyterian @wholebiblehenry

Here, I. Moses charges them to keep God's commandments themselves: You shall diligently keep God's commandments, Deu 6:17-19. Note, It requires a great deal of care and pains to keep up religion in the power of it in our hearts and lives. Negligence will ruin us; but we cannot be saved without diligence. To induce them to this, he here shows them, 1.

Commenting on Deuteronomy 6:17-25

John Gill Reformed Baptist @doctorgill

In order to lead him into the spring and original of them, and to acquaint him with the goodness of God, which laid them under obligation to observe them: we were Pharaoh's bondmen in Egypt; were brought into bondage and slavery to Pharaoh king of Egypt, into whose country their ancestors came, and where they resided many years, and at length were reduced to the...