וַיָּ֥שֶׂם יְהוָ֖ה מוֹעֵ֣ד לֵאמֹ֑ר מָחָ֗ר יַעֲשֶׂ֧ה יְהוָ֛ה הַדָּבָ֥ר הַזֶּ֖ה בָּאָֽרֶץ׃
And the LORD appointed a set time, saying: ‘Tomorrow the LORD shall do this thing in the land.’
Read halakhic rulings (Jewish law) on Exodus 9:5: and classical halakhic sources.