त्वं चाहं च मित्रं लभावहे इत्येवं आदिध् समसंधिः ॥ कZ_०७.९.०४ ॥
tvaṃ cāhaṃ ca mitraṃ labhāvahe ityevaṃ ādiḥ samasaṃdhiḥ
Un traité dont l’ouverture est formulée ainsi : « Toi et moi, nous gagnerons tous deux un ami » — c’est une alliance égale (équilibrée).
Because the stated benefit is symmetric: both parties explicitly claim the same gain (acquiring an ally), implying parity in advantage and obligation.