Thinking this to be the result of the force of habit, the mighty armed son of Pandu practiced with his bow in the night.
तदभ्यासकृतं मत्वा रात्रावपि स पाण्डवः। योग्यां चक्रे महाबाहुर्धनुषा पाण्डुनन्दनः॥