1;  The firstborn are sanctified to God.
  3;  The memorial of the passover is commanded.
 11;  The firstlings of man and beast are set apart.
 17;  The Israelites go out of Egypt, and carry Joseph's bones
     with them.
 20;  They come to Etham.
 21;  God guides them by a pillar of a cloud, and a pillar of
     fire.

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