John Calvin on Exodus 8:5-7

5. And the Lord spake unto Moses, Say unto Aaron. It is questionable whether God thus enjoined Moses in a continuous address, or whether He waited until Pharaoh contumaciously despised His command. It is probable, indeed, that after Pharaoh had paid no attention to the threats, the execution of the punishment was commanded. Meantime, we must recollect what I before said, that Moses moved not even a finger; but, as he had been commanded, transferred the active measures to his inferior minister, that thus Pharaoh might be treated more contemptuously. It was thus that he overwhelmed the whole land, as it were, by a breath. But although in this way God cast down the fierce tyrant in his swelling pride to be trampled beneath their feet, still the wickedness of the magicians did not rest. Thus was it requisite that the servants of God should be exercised by constant contests one after another.

Exodus 8:8-15

8. Then Pharaoh called for Moses and Aaron, and said, Entreat the Lord, that he may take away the frogs from me, and from my people; and I will let the people go, that they may do sacrifice unto the Lord.

8. Tunc vocavit Pharao Mosen et Aharon, ac dixit, Precamini Jehovam ut auferat ranas a me et a populo meo: et dimittam populum, ut sacrificent Jehovae.

9. And Moses said unto Pharaoh, Glory over me: when shall I entreat for thee, and for thy servants, and for thy people, to destroy the frogs from thee and thy houses, that they may remain in the river only?

9. Et dixit Moses Pharaoni, Gloriare super me quando orabo pro te, et pro servis tuis et pro populo tuo, ut exscindantur ranae a te, et a domibus tuis: tantum in flumine residuae sint.

10. And he said, Tomorrow. And he said, Be it according to thy word; that thou mayest know that there is none like unto the Lord our God.

10. Et ait, Cras. Tunc ille dixit, Secundum sermonem tuum, ut scias quod nullus sit sicut Jehova Deus noster.

11. And the frogs shall depart from thee, and from thy houses, and from thy servants, and from thy people; they shall remain in the river only.

11. Recedent igitur ranae abs te et a domibus tuis, eta servis tuis, et a populo tuo: tantum in flumine residuae erunt.

12. And Moses and Aaron went out from Pharaoh; and Moses cried unto the Lord because of the frogs which he had brought against Pharaoh.

12. Tunc egressus est Moses et Aharon a Pharaone. Et clamavit Moses ad Jehovam super causa ranarum, quas immiserat Pharaoni.

13. And the Lord did according to the word of Moses; and the frogs died out of the houses, out of the villages, and out of the fields.

13. Et fecit Jehova secundum sermonem Mosis. Itaque mortuae sunt ranae ex domibus, ex atriis, et ex agris.

14. And they gathered them together upon heaps; and the land stank.

14. Et coacervarunt eas turmatim: et computruit terra.

15. But when Pharaoh saw that there was respite, he hardened his heart, and hearkened not unto them; as the Lord had said.

15. Videns autem Pharao quod esset relaxatio, aggravavit cor suum: neque audivit eos, sicuti loquutus erat Jehova.