Exodus 9:5

5 And God fixed a limit, saying, To-morrow the Lord will do this thing on the land.

Exodus 9:5 Meaning and Commentary

Exodus 9:5

And the Lord appointed a set time
For the coming of this plague, that it might plainly appear it came from him, and was not owing to any natural cause: saying, tomorrow the Lord shall do this thing in the land;
thus giving him time and space, as he had often done before, to consider the matter well, repent of his obstinacy, and dismiss the people of Israel, and so prevent the plague coming upon the cattle, as threatened.

Exodus 9:5 In-Context

3 behold, the hand of the Lord shall be upon thy cattle in the fields, both on the horses, and on the asses, and on the camels and oxen and sheep, a very great mortality.
4 And I will make a marvellous distinction in that time between the cattle of the Egyptians, and the cattle of the children of Israel: nothing shall die of all that is of the children's of Israel.
5 And God fixed a limit, saying, To-morrow the Lord will do this thing on the land.
6 And the Lord did this thing on the next day, and all the cattle of the Egyptians died, but of the cattle of the children of Israel there died not one.
7 And when Pharao saw, that of all the cattle of the children of Israel there died not one, the heart of Pharao was hardened, and he did not let the people go.

The Brenton translation of the Septuagint is in the public domain.