Śrīmad-Bhāgavatam 10.36.24
Blended reading (Sanskrit + English inline)
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mancāḥ
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viewing stands, platforms
Tiered seats around the arena. The Bhāgavatam carefully names the structure — Mathurā becomes a public theater, and Kṛṣṇa-darśana becomes a city-wide event in chapters 42–43.
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malla - raṅga
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wrestling arena
Malla (wrestler) + raṅga (stage). The akhāḍā in the center of Mathurā that will become the place of Kaṁsa's death. Kaṁsa builds his own execution-ground.
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paurāḥ
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the citizens
City-dwellers of Mathurā. They become a major character in their own right in 10.41 when Kṛṣṇa enters the city and they crowd the rooftops; this verse seeds that scene.
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saṁyugam
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the combat
Sam + yuga (joining) — battle. The same root used in Gītā 1.1 (dharma-kṣetre kuru-kṣetre samavetā yuyutsavaḥ). Kaṁsa is staging a yuga of his own; he will lose it.
The word mañcāḥ refers to platforms constructed with large pillars. Kaṁsa wanted a festive atmosphere so that Kṛṣṇa and Balarāma would not be afraid to come.
In order to fool Krsna and Balarama, and to increase the enthusiasm to fight, make a huge festive competition. Otherwise they will flee."
To fool them you should arrange a festival with many pavilions, of different types suitable for the kings and ministers, which will surround the wrestling arena. By this, the city people and people from other places will see the contest which is not arranged by force but free will. Inviting everyone was another way of disguising his motives.
Build a stadium, sell the tickets, fill every seat — and then bring the two cowherd boys into the middle. Kaṁsa is constructing his own dharma-kṣetra without knowing it. The crowd he summons to witness murder will witness avatāra instead.
My note
Source: vedabase.io