Finding that Pharaoh had no veneration at all for God, Moses and Aaron next try whether he had any compassion for Israel, and become humble suitors to him for leave to go and sacrifice, but in vain.
I. Their request is very humble and modest, Exo 5:3. They make no complaint of the rigour they were ruled with. They plead that the journey they designed was not a project formed among themselves, but that their God had met with them, and called them to it. They beg with all submission: We pray thee. The poor useth entreaties; though God may summon princes that oppress, it becomes us to beseech and make supplication to them. What they ask is very reasonable, only for a short vacation, while they went three days' journey into the desert, and that on a good errand, and unexceptionable: "We will sacrifice unto the Lord our God, as other people do to theirs;" and, lastly, they give a very good reason, "Lest, if we quite cast off his worship, he fall upon us with one judgment or other, and then Pharaoh will lose his vassals."
II. Pharaoh's denial of their request is very barbarous and unreasonable, Exo 5:4-9.
1. His suggestions were very unreasonable. (1.) That the people were idle, and that therefore they talked of going to sacrifice. The cities they built for Pharaoh, and the other fruit of their labours, were witnesses for them that they were not idle; yet he thus basely misrepresents them, that he might have a pretence to increase their burdens. (2.) That Moses and Aaron made them idle with vain words, Exo 5:9. God's words are here called vain words; and those that called them to the best and most needful business are accused of making them idle. Note, The malice of Satan has often represented the service and worship of God as fit employment for those only that have nothing else to do, and the business only of the idle; whereas indeed it is the indispensable duty of those that are most busy in the world.
2. His resolutions hereupon were most barbarous. (1.) Moses and Aaron themselves must get to their burdens (Exo 5:4); they are Israelites, and, however God had distinguished them from the rest, Pharaoh makes no difference: they must share in the common slavery of their nation. Persecutors have always taken a particular pleasure in putting contempt and hardship upon the ministers of the churches. (2.) The usual tale of bricks must be exacted, without the usual allowance of straw to mix with the clay, or to burn the bricks with, that thus more work might be laid upon the men, which if they performed, they would be broken with labour; and, if not, they would be exposed to punishment.

And the tale of the bricks - Tale signifies the number, from the Anglo-Saxon to number, to count, etc.
For they be idle; therefore they cry - Let us go and sacrifice - Thus their desire to worship the true God in a proper manner was attributed to their unwillingness to work; a reflection which the Egyptians (in principle) of the present day cast on these who, while they are fervent in spirit serving the Lord, are not slothful in business. See Clarke below Exo 5:17 (note).

Let there more work be laid upon the men,.... Instead of lessening it, let it be increased, or "be heavy" (k) upon them, that it may oppress and afflict them and keep them down, and weaken their strength and their spirits, and diminish them:

that they may labour therein; and have no leisure time to spend in idleness and sloth:

and let them not regard vain words; or "words of falsehood" (l) and lies, such as were spoken by Moses and Aaron, promising them liberty and deliverance from their bondage, which he was determined never to grant, and so eventually make such words to appear to be vain and empty, falsehood and lies.

(k) "aggravetur", Pagninus, Montanus, &c. (l) "in verbis mendacii", Pagninus, Montanus, Vatablus. "Verbis falsis", Junius & Tremellius, Piscator.

tale--an appointed number of bricks. The materials of their labor were to be no longer supplied, and yet, as the same amount of produce was exacted daily, it is impossible to imagine more aggravated cruelty--a perfect specimen of Oriental despotism.