Exodus 10:17 in the King James Version
Now therefore forgive, I pray thee, my sin only this once, and intreat the LORD your God, that he may take away from me this death only.
Context
16 Then Pharaoh called for Moses and Aaron in haste, and he said, “I have sinned against the LORD your God, and against you.
17 Now therefore please forgive my sin again, and pray to the LORD your God, that he may also take away from me this death.”
18 Moses went out from Pharaoh, and prayed to the LORD.