Exodus 8:30 records the same action: Moses goes out from Pharaoh and intreats the Lord after the plague of flies.

Exodus 8:12 shows Moses leaving Pharaoh and crying to the Lord about the frogs – a parallel intercessory pattern after each plague.

Exodus 9:33 records Moses leaving Pharaoh and praying for the hail to stop – same pattern of intercession as here.

Exodus 8:29 records Moses promising to intreat and warning against deceit — parallel to his actual intercession here.