Moses and Aaron did so; they did just as the LORD commanded them.
6. And Moses and Aaron did. It is not for the sake of boasting that Moses reports his own obedience; but after having ingenuously confessed his hesitation, he now relates that he and his brother were in better courage for the performance of their office.
God made Moses a god to Pharaoh, His representative with divine authority to demand obedience and inflict plagues, and gave him Aaron as prophet to denounce those plagues. Though Pharaoh would not listen, God promised the work would be done: Israel would be freed and the Egyptians forced to know Him.
AI summary
Commenting on Exodus 7:1-7
And Moses and Aaron did as the Lord commanded them,.... After this they never showed any reluctance, or made any objection to any message they were sent with, or any work they were ordered to do, but went about it at once, and performed it with all readiness and cheerfulness: so did they; which is not a superfluous and redundant expression, but very emphatic, showing...