Shiva Purana
यः कश्चिद्ब्राह्मणं हत्वा पश्चात्प्राणान्परित्यजेत् ॥ तत्रासौ स्वपतेर्युद्धे स स्वर्गान्न निवर्तते॥ ३०॥
Even a slayer of a brahmin fighting for his master in a battle and dying there attains heaven which becomes his permanent abode.
english translation
yaH kazcidbrAhmaNaM hatvA pazcAtprANAnparityajet ॥ tatrAsau svapateryuddhe sa svargAnna nivartate॥ 30॥
hk transliteration by Sanscript