Manusmriti
यथाऽश्वमेधः क्रतुराड् सर्वपापापनोदनः । तथाऽघमर्षणं सूक्तं सर्वपापापनोदनम् ॥ २६० ॥
As the horse-sacrifice, the king of sacrifices, removes all sin, even so the Aghamarshana hymn effaces all guilt.
english translation
yathA'zvamedhaH kraturAD sarvapApApanodanaH । tathA'ghamarSaNaM sUktaM sarvapApApanodanam ॥ 260 ॥
hk transliteration by Sanscript