Moses said to Pharaoh, "You may have the honor over me -- when shall I pray for you, your servants, and your people, for the frogs to be removed from you and your houses, so that they will be left only in the Nile?"

But I say to you, love your enemy and pray for those who persecute you,

bless those who curse you, pray for those who mistreat you.

General references

Then Moses and Aaron went out from Pharaoh, and Moses cried to the Lord because of the frogs that he had brought on Pharaoh.

But later they had changed their minds. They had taken back their male and female slaves that they had freed and forced them to be slaves again.