At the end of four hundred thirty years, on that very day, all the companies of the HOLY ONE went out from the land of Egypt. That was for the HOLY ONE a night of vigil, to bring them out of the land of Egypt. That same night is a vigil to be kept for the HOLY ONE by all the Israelites throughout their generations.
Exodus 12:41-42
Chag Pesach sameach to my Torah study friends!
Image: Israel leaves Egypt – Dura Europas synagogue fresco – Adaptation by Marsyas, Public domain, via Wikimedia Commons
Matters of Interpretation 
