राज्ञां विश्वासोपगमः शमः संधिः समाधिरिति ॥ कZ_०७.१७.०२ ॥
rājñāṃ viśvāsopagamaḥ śamaḥ saṃdhiḥ samādhiriti
Śama/saṃdhi/samādhi is the attainment of mutual confidence between kings.
Not merely absence of war, but a condition where rulers accept sufficient confidence to cooperate or refrain from hostility.
Treaties must create credible assurance mechanisms—otherwise ‘peace’ is unstable.