Psalm 81

A festival call to sing, and then God speaks with something like grief: "if only you would listen to Me!" He relieved their shoulders of burdens, and He wants to fill their mouths, but they wouldn't. So He let them follow their own devices, which is a judgment in itself. The ending is a longing: honey from the rock.

"I am the LORD your God, who brought you up out of Egypt. Open wide your mouth, and I will fill it." (Psalm 81:10)