Manusmriti
एतदेव चरेदब्दं प्रायश्चित्तं द्विजोत्तमः । प्रमाप्य वैश्यं वृत्तस्थं दद्याच्चैकशतं गवाम् ॥ १२९ ॥
A Brahmana who has slain a virtuous Vaisya, shall perform the same penance during one year, or he may give one hundred cows and one (bull).
english translation
etadeva caredabdaM prAyazcittaM dvijottamaH । pramApya vaizyaM vRttasthaM dadyAccaikazataM gavAm ॥ 129 ॥
hk transliteration by Sanscript