tasya -- of him, Vyomasura; tat -- that; karma -- activity; vijnaya -- fully understanding; krishnah -- Lord Krishna; sarana -- of shelter; dah -- the giver; satam -- to saintly devotees; gopan -- cowherd boys; nayantam -- who was leading; jagraha -- He seized; vrikam -- a wolf; harih -- a lion: iva -- just as; ojasa -- forcefully.

Lord Krishna, who shelters all saintly devotees, understood perfectly well what Vyomasura was doing. Just as a lion grabs a wolf, Krishna forcefully seized the demon as he was taking away more cowherd boys.