Exodus 5:5 And Pharaoh said, “Behold, the people of the land are now many, and you make them rest from their burdens!” The same day Pharaoh commanded the taskmasters of the people and their foremen, “You shall no longer give the people straw to make bricks, as in the past; let them go and gather straw for themselves. But the number of bricks that they made in the past you shall impose on them, you shall by no means reduce it, for they are idle. Therefore they cry, ‘Let us go and offer sacrifice to our God.’ Let heavier work be laid on the men that they may labor at it and pay no regard to lying words.”
To punish Israel for the request and to give them more work (“You seem to have enough time to make these crazy requests – then you must have enough time to work more!”), Pharaoh commanded that the Israelites must gather their own materials (specifically, straw) for making bricks. (Guzik)
But Pharaoh would hear nothing of any worship. He believed that the wish was simply an excuse for procuring holidays for the people, or days of rest from their labours, and ordered the messengers off to their slave duties: “Get you unto your burdens.” For as the people were very numerous, he would necessarily lose by their keeping holiday. (Keil and Delitzsch)
Rulers are not always content simply to refuse inconvenient demands. Sometimes they set to work with much ingenuity and worldly wisdom to prevent their repetition. This is especially the case where they entertain a fear of their petitioners. Pharaoh now is not content to let things take their course, but devises a plan by which he hopes to crush altogether the aspirations of the Hebrew people, and secure himself against the recurrence of any such appeal as that which had been made to him by Moses and Aaron. They had had to dig the clay and temper it, to mix it with straw, and mould it into the form of bricks; but the straw had been supplied to them. The king determined that this should be no longer done; the Israelites should find the straw for themselves. Pharaoh lost no time. Having conceived his idea, he issued his order at once-on the very day of the interview with the two leaders. (Pulpit Commentary)
Not every action required of us by God will be honored by those to whom it is intended. We can expect one of three reactions; acceptance, resistance, and possible retaliation. When you think about it these is exactly the kinds of responses to the Gospel that occur. (Accept, reject, react)
Obviously, the request to Pharaoh was not the same as presenting the good news of the Gospel of Jesus Christ is rejected. However, it was confirming and eternity-defining request that was rejected, hardening his heart and damning his soul.