“The Israelites set out from Rameses… and they encamped at Migdol.”

Slaves Escaping into Sinai Are Seen at Migdol, Papyrus Anastasi V, c. 1250 BCE:

“I was sent forth from the broad halls of the palace… following after two slaves. When I reached the fortress, they told me that the scout had come from the desert saying that they had passed the walled place north of the Migdol.” 

British Museum