Example sentences:

Ramayana: When Narada began to speak, Ravana heard attentively because he knew that Narada was not given to moralizing.

Mahabharata:  When Yudhisthira spoke moral instructions to Draupadi in the forest, she knew that he was not moralizing; he was simply helping both of them to discern the best possible response to the adversity that had befallen them.

Bhagavad-gita:  The Gita is primarily a philosophical book; very few of its passages have a moralizing tone.