What does Exodus 8:28 mean?

Pharaoh said, 'Alright, I'll let you go and sacrifice to your God in the wilderness, but don't go too far. And pray for me, will you?' Exodus 8:28 - Modern Text Bible

(Pharaoh tries to compromise, allowing them to leave but not go far, and even asks Moses to pray for him, showing a mix of fear and self-interest.)