If, again, doing the duty of a father, you had (by directing Duryodhana on the path of virtue) compelled him to follow in the same path, then this calamity would never have befallen you.
स कृत्वा पितृकर्म त्वं पुत्रं संस्थाप्य सत्पथे। वर्तेथा यदि धर्मेण न त्वां व्यसनमाव्रजेत्॥