Arthashastra
अदण्डनैश् च दण्ड्यानाम् अदण्ड्यानां च दण्डनैः । अग्राह्याणाम् उपग्राहैर् ग्राह्याणां च अनभिग्रहैः ॥
by not punishing the guilty and severely punishing the less guilty; by arresting those who are not to be caught hold of and leaving those who are to be arrested.
english translation
adaNDanaiz ca daNDyAnAm adaNDyAnAM ca daNDanaiH । agrAhyANAm upagrAhair grAhyANAM ca anabhigrahaiH ॥
hk transliteration by Sanscript