Complex sentence: He advised Ashwatthama to win the war using his own strength and not through a blessing from him.Earlier Dronacharya's favorite disciple and Pandava prince Arjuna already sought such a blessing and Drona gave that blessing to Arjuna.
Split into simpler sentences: He advised Ashwatthama to win the war using his own strength and not through a blessing from him. Earlier, Dronacharya's favorite disciple and Pandava prince Arjuna already sought such a blessing and Drona gave that blessing to Arjuna.