Although this contract between God and the ancient Israelites is commonly called the Palestinian Covenant, the name is an anachronism.
The area involved was not called Palestine until the Roman era; it was derived from the Roman name for the Philistines -- a group who probably originated in Crete and perhaps from Cyprus.
This one killed every first born (human and animal) in Egypt who had not been protected by a ritual animal sacrifice and specific blood ritual about which only the Hebrews had been informed.
Three months later, Moses and his flock had completed a major detour to Mount Sinai.
Absolutely nothing about the several generations between the death of Joseph at the close of Genesis and the birth of Moses at the beginning of Exodus.