Manusmriti

siva.sh/manusmriti/7/68

बुद्ध्वा च सर्वं तत्त्वेन परराजचिकीर्षितम् । तथा प्रयत्नमातिष्ठेद् यथाऽत्मानं न पीडयेत् ॥ ६८ ॥

sanskrit

Having learnt exactly (from his ambassador) the designs of the foreign king, let (the king) take such measures that he does not bring evil on himself.

english translation

buddhvA ca sarvaM tattvena pararAjacikIrSitam | tathA prayatnamAtiSThed yathA'tmAnaM na pIDayet || 68 ||

hk transliteration by Sanscript