पूर्वोपचितसम्बन्धं तन्मित्रं नित्यमुच्यते ॥ कZ_०७.९.३९च्द् ॥
pūrvopacita-sambandhaṃ tan mitraṃ nityam ucyate
An ally whose relationship has been built up over time (accumulated earlier) is called a ‘permanent ally’ (nitya-mitra).
The tie is not new or opportunistic; it is the result of long-standing, accumulated relations.
Institutionalize alliances—durability comes from sustained engagement and repeated cooperation over time.