Oh, this people have sinned a great sin — God had first told him of it, Exodus 32:7, and now he tells God of it by way of lamentation. He doth not call them God's people, he knew they were unworthy to be called so, but this people. This treacherous ungrateful people, they have made them gods of gold.
Related Commentaries of Exodus 32:31
Exodus 32:31
31 And Moses returned unto the LORD, and said, Oh, this people have sinned a great sin, and have made them gods of gold.