Adam Clarke on Exodus 5:17

Ye are idle - therefore ye say, Let us go and do sacrifice - It is common for those who feel unconcerned about their own souls to attribute the religious earnestness of others, who feel the importance of eternal things, to idleness or a disregard of their secular concerns. Strange that they cannot see there is a medium! He who has commanded them to be diligent in business, has also commanded them to be fervent in spirit, serving the Lord. He whose diligence in business is not connected with a true religious fervor of spirit, is a lover of the world; and whatever form he may have he has not the power of godliness, and therefore is completely out of the road to salvation.