Charles H. Spurgeon on Psalms 81:10

I am the Lord thy God, which brought thee out of the land of Egypt. Thus did Jehovah usually introduce himself to his people. The great deliverance out of Egypt was that claim upon his people's allegiance which he most usually pleaded. If ever people were morally bound to their God, certainly Israel was a thousand times pledged unto Jehovah, by his marvellous deeds on their behalf in connection with the Exodus. Open thy mouth wide, and I will fill it. Because he had brought them out of Egypt he could do great things for them. He had proved his power and his good will; it remained only for his people to believe in him and ask large things of him. If their expectations were enlarged to the utmost degree, they could not exceed the bounty of the Lord. Little birds in the nest open their mouths widely enough, and perhaps the parent birds fail to fill them, but it will never be so with our God. His treasures of grace are inexhaustible,

"Deep as our helpless miseries are,

And boundless as our sins."

The Lord began with his chosen nation upon a great scale, doing great wonders for them, and offering them vast returns for their faith and love, if they would but be faithful to him. Sad, indeed, was the result of this grand experiment.