न च बाह्येन संसर्गं कश्चिदाभ्यन्तरो व्रजेत् ॥ कZ_०१.२०.२२च्द् ॥
na ca bāhyena saṃsargaṃ kaścidābhyantaro vrajet
No insider should form associations with outsiders; no one within should enter into external contact without control.
Because uncontrolled contact enables bribery, recruitment, and leakage of state secrets—classic vectors for espionage and palace coups.