• kaṁsa-prahitam — sent by Kaṁsa
  Contiguous compound: Kaṁsa + prahita (sent). The reinforcements are named as Kaṁsa's. Gauḍīya commentary: the asura keeps escalating; each escalation costs him more. The pattern repeats across Canto 10 — Pūtanā, Tṛṇāvarta, Aghāsura — and culminates in Kaṁsa himself.
• hatvā — having killed
  Absolutive of √han. Past-completed action; the killing is finished before the next verb begins. Gauḍīya note: Kṛṣṇa's combats end cleanly — He does not linger, He does not gloat.
• ceratuḥ — the two of Them walked along
  Perfect dual of √car — to move. They go on strolling. Gauḍīya: after slaughter, līlā continues unbroken. The Lord's destruction is not narratively privileged over His sight-seeing — both are equal līlā.
• hṛṣṭau — happy
  Past participle dual of √hṛṣ — to be delighted. Both brothers are happy after the killing. Gauḍīya: the asura's death is the cosmos's holiday; the Lord shares the cosmos's relief.
• pura-sampadaḥ — the riches of the city
  Contiguous compound: pura (city) + sampad (wealth). They observe Mathurā's opulence. Gauḍīya parallel: the brothers came from Vraja's natural beauty to Mathurā's urban beauty — and they look at it without attachment, the model of yukta-vairāgya.

A king's son, having broken a wedding-pot, strolls out of the bridal court to admire the city as though nothing has happened. Kṛṣṇa kills a battalion, exits the arena by the front gate, and then sight-sees Mathurā — the lightness of Bhagavān after action is itself a teaching.