What does Exodus 12:51 mean?
This emphasizes the truth of this record of the first Passover. This was the exact means, and the exact time, when God accomplished Israel's rescue from slavery (Exodus 12:41). The people obeyed the Lord's commands (Exodus 12:28). As a result, Egypt was judged and the Hebrews were freed (Exodus 12:29–33). Following instructions from that night (Exodus 11:1–2; 12:8, 11, 35–36) made them prepared for sudden travel.Just as prophesied (Genesis 15:13–14), Israel leaves Egypt as a massive group (Exodus 12:37) that included many non-Israelites (Exodus 12:38) and livestock. The phrase "by their hosts" has a military sense. It suggests unity of purpose and movement, rather than random wandering.
In the next chapter, the Lord will provide additional instructions regarding Israel's firstborn and their celebration of the Feast of Unleavened Bread.