संधत्ते चोपकाराय तन्मित्रं वश्यमध्रुवम् ॥ कZ_०७.९.४२च्द् ॥
saṃdhatte copakārāya tan mitraṃ vaśyam adhruvam
—and who enters into agreement for the sake of advantage (upakāra), that ally is ‘amenable but unstable’ (vaśya-adhruva).
They ally primarily for immediate advantage; therefore their cooperation is influenceable but not dependable over time.
Use conditional, monitored, and reversible agreements with transactional partners; avoid overreliance.