Ramayana
ते तु दृष्ट्वा सहस्राक्षमावृतं ब्रह्महत्यया । तं पुरस्कृत्य देवेशमश्वमेधमुपाक्रमन् ॥ 7-86-8 ॥
And seeing the thousand-eyed one enveloped by the sin of brahmin-slaying, they placed that lord of the gods at their head and commenced the horse-sacrifice.
english translation