Verse 1

Let my people

Cf. Exodus 4:22; Exodus 4:23. Possibly Moses and Aaron shrank from delivering the message concerning the firstborn.

Verse 3

three days Cf. Matthew 12:38-40. By death and resurrection will God have his people separated from Egypt -- the world.; Romans 6:1-11; Galatians 6:14-15; Hebrews 13:12; Hebrews 13:13.