Exodus 8:28-30

DouayRheims(i) 28 And Pharao said: I will let you go to sacrifice to the Lord your God in the wilderness, but go no farther: pray for me. 29 And Moses said: I will go out from thee, and will pray to the Lord: and the flies shall depart from Pharao, and from his servants, and from his people to morrow: but do not deceive any more, in not letting the people go to sacrifice to the Lord. 30 So Moses went out from Pharao, and prayed to the Lord.