Deuteronomy 5:11

Thou shalt not idly utter the name of Jehovah thy God for Jehovah will not hold him guiltless that idly uttereth his name.

Image from a 1889 oil sketch of Friedrich Nietzsche on his sick bed by Hans Johann Wilhelm Olde. Goethe-Nationalmuseum, Stiftung Weimarer Klassik und Kunstsammlungen, Weimar, Germany.