Bhagavad Gita 2.9
सञ्जय उवाच
एवमुक्त्वा हृषीकेशं गुडाकेशः परन्तप।
न योत्स्य इति गोविन्दमुक्त्वा तूष्णीं बभूव ह।।2.9।।
Sanjaya uvacha
Evamuktva hrishikesham gudakeshah parantapa
Na yotsya iti govindamuktva tushnim babhuva ha
Simple meaning, written by AISanjaya says that after speaking to Krishna, Arjuna, called Gudakesha, declared that he would not fight and became despondent.