Arthashastra
तं प्रतिदूतम् आदाय निर्गच्छन्तं विजिगीषुर् गृहीत्वा दोषम् अभिविख्याप्य प्रवास्य अपगच्छेत् ॥
The conqueror, having seized that messenger who is returning with an envoy, should publicize his fault , banish him, and then withdraw.
english translation
taM pratidUtam AdAya nirgacchantaM vijigISur gRhItvA doSam abhivikhyApya pravAsya apagacchet ॥
hk transliteration by Sanscript